ophthalmite 
lobster. Morphologically it is an appendage of the first 
cephalic somite, and may consist of two joints, the basi- 
ophthalmite and the podophthalmiti-, as it does in the craw- 
fish. See cuts under cephalothorax and stalk-eyed. 
ophthalmitic (of-thal-mit'ik), a. [< ophthal- 
mite + -ic.] Of or pertaining to an ophthal- 
mite; podophthalmous ; ommatophorous : as, 
an ophthnlmitie segment. 
ophthalmitis (of-thal-mi'tis), . [NL., < Gr. 
o0(te/l^of, eye, + -itis.] Inflammation of the 
eyeball or some part of it. 
op'hthalmohlennorrhea, ophthalmoblennor- 
rhcea (of-thal-rrw-blen-o-re'a), n. [NL. oph- 
tlHi/moblennorrhce'a, < Gr. ix$aA/i.6(, eye, + NL. 
blennorrhea, q. v.] Catarrhal conjunctivitis. 
ophthalmocarcinoma (of-thal-mo-kar-si-no'- 
ma), n.; pi. ophthalmocarcinomata (-ma-ta). 
[l^L., < Gr. o0ftz/u/if, an eye, + Kapitivu/ia, car- 
cinoma : see carcinoma.] Carcinoma of the eve. 
ophthalmocele (of-thal'mo-sel), n. [< Gr. 60- 
Wa/l/iof, an eye, + nifiri, a tumor.] Exophthal- 
mus, or protrusion of the eyeball. 
ophthalmodiastimeter (of-thal-mo-di-as-tim'- 
e-ter), n. [< Gr. b(j>daA/i6, eye, + it6ar(ri/ui), in- 
terval, + [terpov, measure.] An instrument in- 
vented by Landsberg for adjusting the optical 
axes of lenses to the axes of the eyes. It has two 
tubes adjustable as to their distance apart, each tube con- 
taining a plane glass marked with a central line. The 
operator looks through these tubes at a mirror and sees 
the reflection of his own eyes, and the tubes are then moved 
until the lines on the lenses bisect the distance between 
the images of the pupils of the eyes. 
Ophthalmodyilia(of-thal-mo-din'i-a), n. [NL., 
* Gr. opflaAuof, eye, + Miituj, pain.] Pain, espe- 
cially rheumatic pain, of the eye, producing 
a sensation as if the ball were forcibly com- 
pressed. 
ophthalmography (of-thal-mog'ra-fi), n. [< 
Gr. ixp8aA/i6(;, eye, + -ypatyia, < ypatyeiv, write.] A 
description of the eye. 
ophthalmologic(of-thal-mo-loj'ik), a. [<.oph- 
thalmolog-i/ + -ic.] Same as ophthalmological. 
ophthalmological (of-thal-mo-loj'i-kal), a. [< 
ophthalmologic + -al.] Of or pertaining to 
ophthalmology ; relating to the scientific study 
or treatment of the eye. 
ophthalmologist (of-thal-mol'6-jist), . [< oph- 
thalmolog-y + -ist.] One who is versed in oph- 
thalmology. Also ophthalmist. 
ophthalmology (of-thal-mol'o-ji), n. [< Gr. 
u<fi8aA,/i6t;, eye, + -Aoym, < Ae yt.iv, speak: see 
-ology.] That branch of science which deals 
with the eye, its anatomy and functions, in 
health and disease. 
ophthalmometer (of-thal-mom'e-ter), n. [< 
Gr. ofiftz/ljiidf, eye, + ftirpov, measure.] An in- 
strument for measuring the eye, especially for 
determining the radius of curvature of the 
cornea. 
ophthalmometry (of-thal-mom'et-ri), n. [< Gr. 
o^afyof, eye, + -/terpia, < fierpov, measure.] The 
mensuration of the eyeball, especially the de- 
termination of the curvature of the cornea. 
ophthalmophore (of-thal'mo-for), n. [< NL. 
ophthalmophorium, < Gr. o<t>OaA/i6c, eye, + -06>of, 
< ifiepeiv = E. bear 1 .] A part of the head of a 
gastropod specialized to support or contain the 
eyes; an ommatophore. 
ophthalmophorium (of-thal-mo-fo'ri-um), n.; 
pi. ophthalmophoria (-a). [NL'. : see ophthal- 
mophore.] Same as ophthalmophore. 
ophthalmophorous (of-thal-mof'o-rus), a. [As 
ophthalmophore + -otis.] Bearing or support- 
ing the eyes, as a part of the head of a gastro- 
pod ; pertaining to an ophthalmophore. 
ophthalmophthisis (of - thai - mpf - thl 'sis), . 
[NL., < Gr. o^ftz/./zof, eye, + $6lati; a wasting 
away: see phthisis.] In pathol., wasting or de- 
cay of the eyeballs. 
Ophthalmoplegia(of-thal-mo-ple'ji-a),. [NL., 
< Gr. bipeaA/j^f, eye, + irtyyr/, stroke'.'] Paraly- 
sis of one or more of the muscles of the eye. 
Nuclear ophthalmoplegia, ophthalmoplegia due to 
a lesion of the nuclei of the third, fourth, or sixth nerve. 
Ophthalmoplegia externa, paralysis of the muscles 
which move the eyeball. Opitnalmoplegia interna, 
paralysis of the iris and ciliary muscle. Ophthalmo- 
plegia progressive., a progressive ophthalmoplegia due 
to nuclear degeneration, and similar to progressive bulbar 
paralysis and progressive muscular atrophy. Also called 
anterior bulbar partd'lds and poliencephalitis superior. 
Total ophthalmoplegia, ophthalmoplegia involving the 
external muscles of the eyeball, with the iris and ciliary 
muscle. 
Ophthalmoptoma(of-thal-mop-t6'ma),t. [NL., 
< Gr. o^ftzfyoc, eye, + Trru/ta, a fall,< ir'iTrTeiv, fall.] 
Exophthalmus ; ophthalmoptosis. 
ophthalmoptosis (of-thal-mop-to'sis), H. [NL., 
< Gr. Iit6ofyt6f, eye, + TTTUCI;, a falling, < mV- 
reiv, fall.] Exophthalmus. 
Loring's Ophthalmoscope. 
a, mirror ; f>, body ; c , shank, 
into which the handle (not 
shown) is screwed. 
4126 
ophthalmorrhexis (of-thal-mo-rek'sis), w. 
[NL.,< Gr. inflate, eye, + pfjfa, a bursting, < 
fal'vivai, break, burst.] In patliol., rupture of 
the eyeball. 
ophthalmoscope (of-thal'mo-skop), n. [< Gr. 
o<j>6aA[i6f, eye, + OKonelv, 
view.] ATI instrument 
for viewing the interior 
of the eye, especially 
for examining the retina. 
In the simplest form of the in- 
strument light is condensed 
into the eye by means of a con- 
cave mirror, through a small 
hole in the center of which the 
observer examines the eye. 
Behind the body are attached a 
disk containing sixteen lenses 
and a quadrant containing four 
lenses, so arranged that any 
lens of the disk (either singly 
or in combination with any 
lens of the quadrant) can be 
brought into position behind 
the central hole in the mirror 
for determining the focus of 
vision. 
ophthalmoscope (of- 
thal'mo-skop), v. i. [< 
ophthalmoscope, n.~\ To 
view the eye by means 
of the ophthalmoscope. 
ophthalmoscopic (of- 
thal-mo-skop'ik), a. [< ophthalmoscope + -ic.] 
Of or pertaining to the ophthalmoscope or its 
use; performed or obtained by means of the 
ophthalmoscope: as, ophthalmoscopic op tome- 
try. 
ophthalmoscopical (of-thal-mo-skop'i-kal), . 
[< ophthalmoscopic + -al.~] Same as ophthal- 
moscopic. 
ophthalmoscopically (of-thal-mo-skop'i- 
kal-i), adv. By means of the ophthalmoscope 
or of ophthalmoscopie investigation; in rela- 
tion to or connection with ophthalmoscopy. 
ophthalmoscopist (of-thal'mo-sko-pist), n. [< 
ophthalmoscop-y + -ist.] One versed in oph- 
thalmoscopy or the use of the ophthalmoscope. 
ophthalmoscopy (of-thal'mo-sko-Di), n. [< Gr. 
o^Safywif, eye, -r -dKoiria, < aumclv, view.] 1. The 
examination of the interior of the eye with an 
ophthalmoscope. Direct ophthalmoscopy is the exam- 
ination without the interposition of lenses, except so far 
as is necessary to correct the refraction of the eye of the 
observer and of the patient. The image is erect. In in- 
direct ophthalmoscopy a convex lens is interposed, and an 
inverted real image is formed, at which the observer 
looks. 
2. The art of judging of a man's temper from 
the appearance of his eyes. Imp. Diet. 
ophthalmostat (of-thal'mo-stat), n. [< Gr. fy- 
oa%/i6f, eye, + oro-rdf , verbal adj. of iaravai, make 
to stand: see static.] An instrument for hold- 
ing the eye in a fixed position to facilitate oper- 
ations. 
ophthalmotheca (of-thal-mo-the'ka), n.; pi. 
ophthalmotheco! (-se). [NL.,'< Gr. b<p6a?.u6f, the 
eye, + 6f/Kti, a ease: see theca.] In entom., the 
eye-case, or that part of the integument of a pupa 
which covers the compound eye. 
ophthalmotomy (of-thal-mot'o-mi), n. [< Gr. 
o06 1 a/l l uo'f, eye, + -ro/iia, < TCJIVS.IV, Ta/itlv, cut.] 1. 
In anat., dissection of the eye. 2. In surg., 
an incision into the eye ; also, the excision of 
the eye. 
ophthalmotonometer (of-thal"mo-to-npm'e- 
ter), n. [< Gr. o$8aJ(ft6f, eye, + rovo'f, tension, + 
perpov, measure.] An instrument for measur- 
ing the tension of the eyeball. 
ophthalmotonometry (of-thaFmp-to-nom'et- 
ri), n. [As ophthalmotonometer + -y.] The mea- 
surement of intra-ocular tension. 
ophthalmy (of-thal'mi), n. Same as ophthal- 
mia, 
Opianic(o-pi-an'ik),a, [<. opiane + -ic.] Derived 
from opiane; noting an acid (Cj H 10 O 5 ) ob- 
tained from narcotine by the action of oxidiz- 
ing agents. It forms crystallizable salts and 
an ether. 
opiate (6'pi-at), a. and re. [= F. opiat = Sp. 
Pg. opiato = It. oppiato, n., an opiate, electu- 
ary; < NL. *opiatus, neut. as noun, opiatum, < 
L. opium, opium : see opium and -atei.] I. a. 
Furnished with opium ; mixed or prepared with 
opium; hence, inducing sleep; soporiferous ; 
somniferous; narcotic; causing rest or inaction. 
More wakeful than to drowse, 
Charm'd with Arcadian pipe, the pastoral reed 
Of Hermes, or his opiate rod. Milton, P. L. , xi. 133. 
II. n. Any medicine that contains opium and 
has the quality of inducing sleep or repose ; a 
narcotic : hence, anything which induces rest 
opinatively 
or inaction, or relieves uneasiness or irritation, 
mental or bodily; anything that dulls sensa- 
tion, mental or physical. 
Then all for death, that opiate of the soul. 
Pope, Moral Essays, ii. 91. 
opiate (6'pi-at), v. t. ; pret. and pp. opiated, ppr. 
opiating. [< opiate, .] 1. To lull to sleep; 
ply with opiates. [Rare.] 
Though no lethargic fumes the brain invest, 
And opiate all her active pow'rs to rest. 
Fenton, Epistle to T. Lambard. 
2. To dull the effect of upon the mind, as by 
an opiate. 
We long to die in that spot which gave us birth, and in 
that pleasing expectation opiate every calamity. 
Goldsmith, Citizen of the World, ciii. 
opiated(6'pi-a-ted),. [<. opiate + -ed 2 .] Mixed 
with opium. 
The opiated milk glews up the brain. 
Verses prefixed to Rennet's tr. of Erasmus's Praise of Folly. 
[(Dames.) 
opiatic (6-pi-at'ik), a. [= F. opiatique = Sp. 
opiatieo; as opiate + -ic.] Of or pertaining to 
opiates; characteristic of or resulting from the 
use of opiates. [Bare.] 
Diluting this [arrack] with much water, I took it from 
time to time to combat the terrific opiatic reaction, and 
gradually I came back to my normal state. 
O'Donovan, Merv, xi. 
opiet, [ME., also opye; < OF. opie, < L. opiiim, 
opium: see opium.] An opiate; opium. 
The narcotikes and opies ben so stronge. 
Chaucer, Good Women, 1. 2670. 
opiferoust (o-pif 'e-rus), a. [< L. opifer, bring- 
ing aid, < ops (op-), aid, *- ferre = E. bear 1 .] 
Bringing help. 
opifext (op'i-feks), . [= It. opifice, < L. opifex, 
a worker: seeo^rce.] Anopificer; a maker; a 
cause. 
opificet (op'i-fis), n, [= It. opificio, < L. opifi- 
cium, a working, doing of a work : see office.] 
Workmanship. 
Looke on the heavens ; . . . looke, I say ; 
Doth not their goodly opifice display 
A power 'bove Nature ? 
Times' Whistle (E. E. T. S.), p. 7. 
opificert (o-pif 'i-ser), n. [< opifice + -erl. Cf. 
officer.] One who performs any work. Cud- 
worth, Intellectual System, p. 54. 
Opilio (o-pil'i-6), n. [NL. (Herbst, 1793), < L. 
opilio, a shepherd, also a certain bird ; for 
*ovilio, < ovis, a sheep: see Ovis.] A genus of 
harvestmen, giving name to the order Opiliones. 
Opiliones (o-pil-i-6'nez), n. pi. [NL. (Sunde- 
vall, 1833), pi. of Opilio.] An order of the class 
Arachnida, in which the cephalothorax is unit- 
ed with the abdomen by its entire posterior 
border. The abdomen is, at least posteriorly, distinctly 
jointed; the mandibles have three joints; the coxa? of the 
front legs form an auxiliary pair of maxillae ; eyes two, 
very rarely more or none ; respiration through trachea? ; 
the sexes distinct. These creatures are commonly known 
as daddy-long-legg, and are found in all parts of the globe. 
They live on the ground and are predaceous, feeding usu- 
ally on insects. The order is also called Opilionea, Opili- 
onina, and Phalangidea. 
opilionine (o-pil'i-o-nin), a. and n. I. . Of or 
pertaining to the Opilionina; phalangidean. 
H. n. One of the Opilionina. 
opimet (o-pem'), a. [= Sp. Pg. It. opimo, < L. 
r'mus, fat, rich, plump.] Kich; fat; abun- 
it; eminent. 
Great and opime preferments and dignities. 
Dr. H. More, Mystery of Godliness, II. xv. 3. 
opinable (o-pi'na-bl), . [< OF. opinable = Sp. 
opinable = Pg. opinarel = It. opinabile, < L. opi- 
nabilis, that rests on opinion, conjectural, < opi- 
nari, think: see opine.] Capable of being opined 
or thought. 
opinant (o-pl'nant), . [< F. opinant = Sp. Pg. 
It. opinante, < L. opinan(t-)s, ppr. of opinnri. 
suppose: see opine.] One who forms or holds 
an opinion. [Bare.] 
The opinions differ pretty much according to the ua- 
ture of the opinants. 
Thackeray, Roundabout Papers, Some late great Victories. 
opinationt (op-i-na'shon), n. [< L. opii/atio(>i-^, 
a supposition, conjecture, < opinari, suppose: 
se_e opine.] The act of thinking; opinion. 
opinativet (o-pin'a-tiv), a. [< OF. opinatif = 
Sp. Pg. It. opinaiivo, < ML. *opinativus, < L. 
opinari, suppose : see opine.] Opinionated ; ob- 
stinate in maintaining one's opinions. 
If any be found . . . that will not obey their falsehood 
and tyranny, they rail on him, . . . and call him ojrina- 
tive, self-minded, and obstinate. 
Tyndale, Ans. to Sir T. More, etc. (Parker Soc., 1850), p. 159. 
opinativelyt (o-piii'a-tiv-li), adr. In an opina- 
tive manner; conceitedly. Sir T. More, Works, 
p. 924. 
