operation 
of the ilium.- Davies-CoUey's operation for talipes, 
the removal of a wedge-shaped piece of the tarsus, with- 
out regard to the articulations. Delpech's operation 
for ligation of the axillary artery, an operation by 
incision along the delto- pectoral interval. DldOt S oper- 
ation for webbed fingers, the taking of flaps from the 
dorsal and palmar surfaces of the attached lingers respec- 
tively, to form the contiguous Intel-digital surfaces. 
Dieffenbach's chiloplastic operation, the restoration 
of the upper lip by a quadrangular flap, attached below 
on the level of the mouth, turned horizontally inward 
to meet a similar one of the opposite side. Dieffen- 
bach's rhinoplastio operation, the taking of a lance- 
shaped flap from the forehead for the repair of the nose. 
Dupuytren's operation at the shoulder-Joint, am- 
putation at the shoulder by the external-flap method. 
Dupuytren's operation for stone in the bladder, 
bilateral lithotomy. Dupuytren's operatipn for vagi- 
nal atresia an operation by combined incision and dila- 
tation. Emmet's operation of cqlporrhaphy, the su- 
tural approximation of three equidistant, transverse, in- 
fracervical, denuded spots on the anterior wall of the va- 
gina, and the apposition of the opposing edges of the folds 
thus formed after abrasion. Emmet's operation, a 
hysterotrachelorrhaphy for cicatricial ectropium of the 
cervix uteri. Ferguson's operation, a modification of 
Pirogoff's operation for amputation of the foot, in which 
the malleoli are not removed. Gant's operation, an 
operation for vicious ankylosis of the hip-joint, by section 
below the trochanters. Goyrand's operation for liga- 
tion of the internal mammary artery, an operation 
with an oblique incision two inches long, at the end of the 
intercostal space, near the edge of the sternum. Glitti's 
operation, amputation at the knee, through the base of 
the coudyles. with a large rectangular anterior flap includ- 
ing the patella, the inner sawed surface of which is applied 
to that of the femur. Guerin's operation, an operation 
for amputation at the elbow-joint by an external flap. 
Guthrie's operation for amputation at the hip- 
joint, amputation by anteropostenor flaps, the flaps being 
cut from without inward. Hahn's operation, nephror- 
rhaphy for floating kidney. Hancock's operation, a 
combination of the subastragaloid amputation and Piro- 
goff's amputation of the foot, the sawn surface of the cal- 
canenm being applied to that of the astragalus Hey's 
operation, amputation through the tarsometatarsal ar- 
ticulations, now usually understood as a disarticulation of 
the outer joints and section of the internal cuneiform. 
High operation, lithotomy when the incision is made 
above the pubis. Also called mprapubic operation. 
Hodgson's operation for ligation of the axillary 
artery, an operation by a semflimar incision, just below 
the clavicle, terminating near the anterior margin of the 
deltoid. Hoin's operation, amputation at the knee- 
joint by the posterior-flap method. Holt's operation, 
an operation for the rupture of urethral stricture by rapid 
dilatation. Hunter's or Hunterian operation for an- 
eurism, ligation of the artery on the cardiac side of the 
aneurism, at some distance from it. Identical, lateral, 
etc., operations. See the adjectives. Indian rhino- 
plastic operation, the restoration of the nose by means 
of a flap taken from the forehead. Jacque's operation 
for excision of the tongue, excision of the tongue 
through an opening made in the cheek. Kocher's op- 
eration, an operation for the excision of the tongue by 
an incision in the neck at the angle of the jaw, with re- 
moval of the glands so as to get far down to the base of the 
tongue. Langenbeck's operation, a method of ampu- 
tation by double flaps, cutting from without inward. 
Larrey's operation at the shoulder-Joint, amputa- 
tion at the shoulder by the oval method. Lee s opera- 
tion, a modification of Teale's method of amputation of 
the leg, in which the longer flap is taken from the back 
of the leg, including only the superficial muscles. Le 
Fort's operation, (a) A modification of Pirogoff's am- 
putation of the foot* whereby the calcaneum is preserved 
in a more normal position. (&) For procidentia uteri : a 
denudation on the anterior and posterior walls of the va- 
gina, and formation of longitudinal septum. Lines of 
operation. SeeKn2. Lisfranc's operation, (a) At 
the shoulder-joint : amputation at the shoulder by the an- 
teroposterior-flap method. (&) A pure tarsornetatarsal 
disarticulation. See Hey's operation. Lister's opera- 
tion, a modification of Teale's amputation, in which there 
is less difference in the length of the flaps, their angles 
being rounded, and the posterior one formed of skin and 
fascia only. Listen's operation, a combination of the 
double-flap and circular operations in amputations, by 
first dissecting up two semi-oval flaps to serve as covers 
for the flat-faced stump. Liston's operation at the 
thigh-Joint, amputation by anteroposterior flaps, the 
flaps being cut from within outward, and disarticulation 
being effected before the posterior flap is cut. Liston's 
4122 
Nathan Smith's operation, amputation at the knee- 
joint by a large anterior and a smaller posterior skin-flap. 
Nunneley's operation for excision of the tongue, 
opercular 
radical cure of inguinal hernia, the plugging of the 
hernial canal by an invagination of the scrotum and its 
retention by exciting adhesive inflammation in the neck 
grace. Pagenstecker's operation, an open 
extraction of cataract in the capsule. Passavant's op- suits; acting; exerting force or influence, 
eration for synechia, the breaking up of the adhesion 
with forceps. Passive operations. See passive. Peas- 
lee's operation, superficial trachelotomy. Petlt's op- 
eration, (a) For amputation of the finger : amputation 
by lateral flaps cut from within outward, (b) For hernia: 
an operation without opening the sac. Pirogoff's op- 
eration, amputation of the foot in such a manner that 
the posterior portion of the caleaneum is united to the 
lower sawed end of the tibia, thus preserving the heel. 
Porro's operation, an operation for ceesarean section ; 
laparohystero-oophorectomy, or utero-ovariaii amputation 
with drainage through the vagina. In the Porro-Muller 
operation, the uterus is brought outside of the abdomen 
and the contents removed. Ravaton's operation, a 
double-flap amputation by a circular incision to the bone, 
and a longitudinal incision on each side. Regnoli's 
operation for excision of the tongue, excision of the 
tongue through a semilunar incision made beneath the 
chin along the border of the jaws, joined by another in- 
cision in the median line extending from the chin to the 
hyoid bone. Reverdin's operation, skin-grafting. 
Roux's operation, a modification of Syme's amputation 
of the foot, in which the flap is taken from the inner and 
under side of the heel. ROUX'B operation for excision 
Of the tongue, excision of the tongue by dividing the 
jaw at the symphysis and removing the tongue from be- 
low. Roux's operation for ligation of the axillary 
artery, an operation by an incision through the delto- 
pectorai interval. Sayre's operation for ankylosis 
Of the hip, section of the femur above the lesser tro- 
:hanter, with the removal of a semicircular piece of bone 
The operative strength of a thing may continue the same 
when the quality that should direct the operation is 
changed. South, Sermons, VI. i. 
His [Carlyle's] scheme of history is purely an epical one, 
where only leading figures appear by name and are in any 
strict sense operative. Lowell, Study Windows, p. 133. 
2. Efficacious; effective; efficient. 
Our foster-nurse of nature is repose, 
The which he lacks ; that to provoke in him 
Are many simples operative, whose power 
Will close the eye of anguish. Shak., Lear, iv. 4. 14. 
Your lordship may perceive how effectual and operative 
your lordship's last dealing with her majesty was. 
Bacon, To the Lord Keeper, Sept. 28, 1594. 
3 . Concerned with the actual exercise of power, 
or the putting forth of effort or labor in the ac- 
complishment of some end ; practical. 
In architecture, as in all other operative arts, the end 
must direct the operation. Sir B. Wotton, Reliquire, p. 6. 
4. Of, pertaining to, or concerned with opera- 
tions, as those of surgery. 
II. n. A workman; an artisan. 
The well educated operative does more work, does it bet- 
ter, wastes less, . . . earns more money, . . . rises faster, 
rises higher, . . . than the uneducated operative. 
K. Choate, Addresses, p. 121. 
and the rounding of the upper shaft-end so as to facilitate n _._ a ij_ i_ / nn ' p ,5 tiv lil nrtr 
the formation of a false joint.- Schroeder-s operation operatively (op e-ra-ti v-li), aai . 
for the removal of fibroid tumors of the uterus, an tive manner. 
operation by laparotomy with ligation of the uterus at the operativeness (op'e-ra-tiv-nes), . The qual- 
osinterimm.-Schroeder's operation of colporrha- ft v or fact of being operative ; efficiency; prac- 
phy, the removal of a single long and broad strip of the JJy , .&., 
vaginal wall and the approximation of the cut edges by tical or effective working. 
sutures. Schwartze's operation, the method of open- operativity (op"e-ra,-tiv'i-ti), n. [< operative 
ing the mastoid cells by the use of hammer and chisel. + -ity.~\ The condition of being operative; 
efficiency. 
operator (op'e-ra-tor), n. [= F. operateur = 
Sp. Pg. operador =' It. operatore, < LL. opera- 
the mouth and attached above: it is the reverse of 
. 
Scoutetten's operation, the oval method of amputation, 
upper lip by quadrangular flaps extending below the level 
of t" 
tor, a worker, < L. operari, work : see operate.] 
1. One who operates in any way, or on or 
against anything. 
Then the Operator told him the Operation [in Alchymy) 
would go on more successfully if he sent a Present of 
Crowns to the Virgin Mary. 
N. Bailey, tr. of Colloquies of Erasmus, I. 406. 
(a) One who performs a surgical operation. (6) One who 
exercises power, labor, skill, or influence in the accom- 
plishment of some end ; one who manipulates something, 
or is engaged in carrying on a series of acts or transactions 
by which some intended result is to be reached : as, a tel- 
egraph-operator; a Wall-street operator; an operator in 
wheat. 
2. In math., a letter or other character signi- 
fying an operation to be performed, and itself 
subject to algebraical operation: as, a vector 
operator Hamiltonian operator, in math., the op- 
erator 
. d . . d . . d 
where x, y, z are the rectangular coordinates of the vari- 
able point in space where the operand is found, and i, j, 
k are unit vectors respectively parallel to x, y, z. La- 
place's operator, in math., the operator 
/d\2 /<Z\- /<J\ 
U) + ) + (*) 
IM^'111,111 tyllluLulllJ. AJU1CUO.O WfCX OlbAUll. .'II I I J II ']'a I II I II 
for cicatricial stenosis of the pylorus by divulsion with 
the finger. Major operation, in surg., same as capital 
operation. Malgaigne'B operation, (a) The operation 
en raquette of the French, a variety of the oval method of 
amputation of Scoutetten, applicable particularly to the 
thumb. (&) Subastragaloid operation. Manec's opera- 
tion for amputation at the hip-Joint, amputation by 
a single long anterior flap made by transfixion, and then 
by disarticulating the joint and making a circular incision 
posteriorly. Marian operation, the old median peri- 
neal operation for stone in the bladder. See AUartons op- 
eration M'Burney'g operation, an operation for the 
radical cure of hernia by exposing the sac and cutting it 
off at the neck and sewing up the cut edges. Minor op- 
eration, in svrg., an operation of less magnitude and 
danger than a capital operation. Moore's operation, 
an operation for the extraction of cataract, involving a 
preliminary iridectomy made some weeks beforehand. 
Mott's operation for ligation of the innominate 
artery, an operation by a transverse incision above and 
parallel to the top of the sternum and the inner end of the 
clavicle, joined by another of the same length along the 
anterior border of the sternomastoid muscle. Murray's 
operation for ligation of the abdominal aorta, an 
operation by an elliptical incision on the left side, six 
inches long, from the cartilage of the tenth rib to within 
an inch of the anterior superior spine of the ilium. 
Dieffenbach's operation. SedillOt'S operation, (a) Am- 
putation by a combination of the flap and circular meth- 
ods. Superficial flaps are formed from within outward, 
and the deep muscles are divided circularly. (6) An op- 
eration for staphylorrhaphy, in which liberating incisions 
are made on each side of the suture. Sedillot's opera- 
tion for ligation of the innominate artery, an op- 
eration by an incision between the heads of the sterno- 
ciidomastoid muscle. Simon's operation for vesico- 
vaginal fistula, the adaptation of the pared margins of 
the fistula by silk sutures, without retention afterward 
of a stationary catheter. The mucous membrane of the 
bladder is included in the abrasion. Simpson's opera- 
tion for division of the cervix uteri, an operation in- 
volving bilateral incisions through the whole length of 
the cervical canal. Sims's operation for vesico- vagi- 
nal fistula, the coaptation of the pared margins of the 
fistula by silver sutures, with after-treatment by recum- 
bency of the patient and prolonged retention of the cathe- 
ter. The marginal abrasion does not Include the vesical 
surface. Sims's operation of colporrhaphy, the denu- 
dation of a V-shaped surface on the anterior wall of the 
vagina, and the apposition of its arms by sutures. Streat- 
feild's operation for entropium, removal of a wedge- 
shaped strip from the tarsal cartilage. Syme's opera- 
tion, the removal of the entire foot and the articular sur- 
face of the bones of the leg just above the malleoli, the 
stump being covered with the skin of the heel. Byrne's 
operation for stricture, the division of the stricture 
through the perineum upon a grooved director. Tail's 
operation, an operation for the extirpation of the uterine ... T T . 
appendages. It is the same as Battey's operation, with Operatoryt (op'e-ra-to-ri), . [< LL. as if 'ope- 
the inclusion of the Fallopian tube. Taliacotian op- ratorium, neut. of operatorms, creating, forrn- 
eration (alter Gasparo Ta.glw.aazi or Taliacotius, of Bo- i ng < operate)-, a worker: see operator.] A labo- 
logna, who died in 1599), an Italian method for the resto- __?;._, rmnltni 
ration of the nose by means of tissue taken from the in- ] [orv ' . * , 
side of the arm. Teale's operation, amputation by the Operatrice (op e-ra-tris), n. [= 1 . operatrice = 
rectangular-flap method, in which a long flap, taken from It. operatrice, < LL. operatrix, fern, of operator, 
the less muscular (usually the anterior) side is folded operator: see operator.] A female operator, 
over the stump and upon itself, and united to the shorter, 
more muscular (usually the posterior) flap. Thomas's Sapience, ... the operatnce of all thynges. 
operation for the removal of uterine fibroid tumors, & r T. Elyot, The Goveruour, iii. 23. 
an operation by laparotomy.withuseof the clamp, and char- opercle (6-per'kl), n. [< L. operculum : sec oner- 
nag of the end of the pedicle. -Tripier'S operation, i,?;,, , 1 A,, nn P Piilnm 
a modification of Chopart's mediotarsal amputation, in OWUW.J An operculum. 
which the os calcis is sawed off horizontally. Vermale's OperCUla, . Plural of operculum. 
operation, the ordinary double-flap method of amputa- opercular (o-per'ku-lar), a. [X opercultttti + 
tion by transfixion and cutting from within outward: ap- . f ,,. 3 .] i. (jf or pertaining to an operculum or 
plicable to any hmb.- Von Graefe's operation for cat- , _ _^ lc o Wovino- n-noroiilntn fittpri 
aract, a modified linear extraction of the cataract, com- opercle. 4. Having an operculum, 
bining a peripheral linear incision in the cornea and an with or closed by ail operculum; operculate. 
iridectomy. Wardrop's operation for aneurism, liga- 
tion of a main branch of the artery beyond the aneurism, 
leaving a circulation, however, through another branch. 
Wheelhouse's operation for stricture, the division of 
the stricture on a grooved probe passed through the stric- 
ture from an opening made into the urethra in front of it. 
Whitehead's operation for excision of hemor- 
rhoids, the excision of a circular strip around the anus, 
including the tumors. Whitehead's operation for ex- 
cision of the tongue, excision through the mouth, using liim, which is connected by a liga- 
only scissors. Wolfe S operation for ectropium, an ment with the lower jaw ; and (4) 
operation by transplantation of a flap from a distance, an entirely separate element in 
without a pedicle. Wood's operation for the radical front of the operculum and con 
cure of inguinal hernia, the closing of the hernial canal nected with the suspensorium of 
by subcutaneous sutures through the tendinous structures the lower jaw : the prenpercitlum. cll \^. r u nreopVrcuium 
forming its boundaries. Wutzer's operation for the The first, second, and fourth of d, bterop^rculum. 
Opercular apparatus, in fishes, the gill-cover, which 
in most cases consists of four pieces : (1) a posterior piece : 
the operculum proper ; (2) one 
bounding the operculum below 
and more or less behind : the sub- 
operculum; (3) one between the 
suboperculum and the opercnlum 
on the one hand and the preoper- 
culum in front : the internpercu- 
