valvate 
provided with valves; valviferous; valvated: as, 
valvate vessels; a valvate orifice. 2. In bot., 
united by the margins only, and opening as if 
by doors or valves, as the 
capsules of regularly de- 
hiscent fruits, the anthers 
of certain Ericaceae, and 
the parts of a perianth 
which in the bud meet 
without overlapping: said 
also of an estivation thus 
characterized, 
valve (valv), . [< F. 
rulrc = Sp. Pg. It. vulva, < 
L. valva, the leaf of a dou- 
ble door, pi. valree, fold- 
ing doors, NL. a valve.] 
1. One of the leaves of a 
folding door; in the plu- 
ral, a folding door. 
Swift thro' the valves the vis- 
ionary fair 
Repass'd. 
Pope, Odyssey, iv. 1093. 
Valves of a Brachiopod (Leptana). 
A, both valves, seen edgewise, 
showing hinge-area (I-', ventral 
valvc) . ^ d,,^, va | ve . interior. 
valves ; d, pod of Barbar 
utilgaris with valvate dehis- 
cence. 
IT, the valvate estivation 
of the corolla of Amptlopsis 
quinquefolia ; b, the flower 
of the same, open; c, stamen 
of Herberts vulgaris, with 
Heavily closed, with a jarring the anther dehisdng with 
sound, the valves of the barn- 
doors. 
Longfellow, Evangeline, i. 2. 
2. Any device or appliance used to control the 
flow of a liquid, vapor, or gas, or loose mate- 
rial in bulk, through a pipe, passageway, out- 
let, or inlet, in any form of containing vessel. 
In this wide and general sense, the term Includes air-, gas-, 
steam-, and water -cocks of any kind, water-gates, air-gates, 
and keys to musical wind-instruments. Rotary valves are 
valves in which the leaf, disk, plug, or other device used 
to close the passage is made to revolve for opening or 
closing (the common stop-cock being an illustration); 
lifting-valves are those in which the ball, cone, or other 
stopper is lifted or raised clear of the valve-seat by pres- 
sure (usually that of the gas, steam, or liquid in the pipe) 
from below, the poppet-, ball-, and safety-valves being ex- 
amples; hinged valves constitute a large class used in 
both air- and water-pipes, as the butterfly-valves, clack- 
valves, and other forms in which the leaf or plate of the 
valve is fastened on one side to the valve-seat or open- 
ing. Springs are sometimes used to keep such valves 
closed. Sliding valves are those in which the gate or leaf 
slides aside to open the valve-way, the D-valve and some 
forms of water- and gas-main valves being examples. 
The long-hinged valves of a pipe-organ, and the round 
stoppers operated by keys, as in the flute and other instru- 
ments, are called key-valves. The names by which valves 
are distinguished are often descriptive of the shape or mo- 
tion of the valves, of their use, or of the method by which 
they are operated, as globe-valve, screw-valve, blow-through 
valve, relief-valve, throttle-valve. In a trade sense, valves 
appear to be distinguished from cocks. A cock is a small 
plug-valve operated by hand. Other valves moved by 
screws or levers, or operated by power through some ma- 
chinery, all self-acting appliances, and all large or compli- 
cated gates, stoppers, or cocks, are called noire*. The 
universal use of steam, gas, and water has led to the inven- 
tion of a great variety of valves. In musical wind-instru- 
ments of the trumpet class, the valve is a device for 
changing the direction and length of the air-column so 
as to alter the pitch of the tone. The two forms most in 
use are the piston and the rotary valve the former be- 
ing a perforated plunger working in a cylindrical case, and 
the latter a four-way cock, both being operated by the 
fingers of the player's right hand. The result of using a 
valve is to add to the main tube of the instrument a sup- 
plementary tube or crook of such length that the proper 
tone of the whole is lowered by some definite interval. 
The number of valves is commonly three, the first lower- 
ing the fundamental tone a whole step (and all its har- 
monics proportionally), the second lowering it a half-step, 
and the third a step and a half. A fourth valve is some- 
times added on large instruments, lowering the pitch two 
steps and a half ; and five and six valves have occasional- 
ly been tried. Two or more valves are used simultane- 
ously with combined effect. Valves are more or less de- 
manded to compensate for the incompleteness of the scale 
of all instruments of this family, and to provide for rapid 
changes of tonality. They are also useful in particular 
cases to remedy the inaccuracy for concerted music of cer- 
tain of the regular harmonic series of tones. Their ex- 
tended application has greatly developed the capacity of 
all kinds of brass instruments for rapid and unrestricted 
execution. But on the other hand valves and supplemen- 
tary crooks cannot always give exactly accurate intona- 
tion, and the angles which they more or less necessitate 
in the air-column tend to injure the purity of the tones. 
Various compensations for these drawbacks have been at- 
tempted, with some success; but valve-instruments are 
still seldom used in the orchestra, while they are numer- 
ous in military bands. See piston, 2, and compare keyl, 
4 (a). See cuts under back-pressure, ball-cock, conical, 
organ, reed-organ, twin-valve, slide-valve, steam-engine, 
safety-valve. 
3. In anat. and zool., a membranous part, fold, 
or thin layer which resembles a valve, or actu- 
ally serves as a valve in connection with the 
flow of blood, lymph, or other fluid; a valva 
or valvula: as, the valve of Vieussens in the 
brain ; the connivent valves of Kerkring in the 
intestine ; valves of the heart, of the veins, etc. 
See cuts under bulb, Crinoidea, heart, lymphatic, 
and vein. 4. In bot., in flowering plants, one of 
the segments into which a capsule dehisces, or 
which opens like a lid in the dehiscence of cer- 
tain anthers. In Diatomaceas each half of the 
6692 
silicified membrane or shell is called a valre. 
See cuts under Marsilea. septicidal, and silicle. 
5. In conch., one of the two or more separa- 
ble pieces of which the shell may consist, or the 
whole shell when it 
A 
is in one piece ; each 
shell, right and left, 
of ordinary bivalves, 
and each shell, dor- 
sal and ventral, of 
brachiopods. See bi- 
valve, multivalve, uni- 
valve, equivalve, in- 
equivalve, and cuts 
under Caprotinidee, 
Chamidx, intearopal- 
liate, and sinwpal- 
liate. 6. In entom., 
a covering plate or sheath of any organ, gen- 
erally one of a pair of plates which unite to 
form a tube or vagina, as those covering the 
external sexual organs, ovipositor, etc Acces- 
sory, aortic, back-pressure, basal valve. See the 
qualifying words. Auriculoventricular valves.valves 
guarding either auriculoventricular orifice of the heart : 
on the right side the tricuspid, on the left the mitral. See 
cuts under heart. Bauhinian valve. Same as ileocsecal 
valve. Bicuspid valve. Same as mitral valve. Blow- 
through, brake-shoe, conical valve. See blow-through, 
etc. Connivent valves. See valvulse cotmiventes, un- 
der valvula. Coronary valve. See coronary. Cylin- 
drical valve. See cylindric. Delivery- valve. See de- 
livery. Eustachian valve. See Eustachian. Gridiron 
valve. See gridiron. Hasner's valve, an imperfect 
valve formed by the mucous membrane at the meatal end 
of the nasal duct. Heister's valve, folds of mucous 
membrane at the neck of the gall-bladder and in the cys- 
tic duct, which present the appearance of a spiral valve. 
See cut under slmnach. Hydraulic, hypopygial, ileo- 
caecal, inferior valve. See the adjectives. Ileocolic 
valve. Same as ileocsecal valve. Kingston's valve, a 
conical valve forming the outlet of the blow-off pipe of a 
marine engine. It opens through the side of a vessel by 
turning a screw. Long valve, in a steam-engine, same 
eslongslide (which see, under slide). Low-water valve, 
a valve which opens automatically and allows steam to es- 
cape when the water in an engine-boiler is reduced too low 
for safety. Mitral valve.a valve formed by two triangu- 
lar folds of the endocardium, or inner lining of the heart, 
situated at the opening between the left ventricle and the 
auricle, and serving to prevent regurgitation of blood 
into the latter cavity. Also bicuspid valve. See cut under 
heart. Oral valves. See oral. Oscillating valve, a 
steam- valve which reciprocates on a pivot. It is frequently 
used with oscillating steam-engines. Overpressure- 
valve. See overpressure. Pocketed valve, a valve fit- 
ting into a depression or pocket Pot-lid valve, (a) A 
cap-formed valve which shuts down like a cover upon a 
port or the end of a pipe. (6) The cover of the air-pump of 
a steam-engine, E. H. Knight. Pulmonary valves. See 
pulmonary, and cut under heart. Pulxnonic valves. 
Same as pulmonary valves. Pyloric valve, (a) A small 
tubercle situated at the anterior angle of the trigonum of 
the bladder. (6) Any formation serving to obstruct or 
close the pyloric oriflce of the stomach. A pylorus may 
have a valvular construction, or a muscular sphincter 
may surround the orifice. See pylorus, 2 (b). Regula- 
tor-valve, a throttle-valve. Reverse valve, in boilers, 
a valve opening inward to the pressure of the atmosphere 
when there is a negative pressure in the boiler. -Ko- 
tary valve. See rotary. Semilunar aortic valve, 
semilunar pulmonary valve. See semilunar, and cut 
under heart. Semilunar valve of the brain. Same 
as valve of Vieussens. Sigmoid valve. See sigmoid. 
Spiral valve. See spiral. Steam- thrown valve, in a 
steam-engine or steam-pump, a valve moved by direct 
steam-pressure, without the intervention of an eccentric, 
crank, cam, or valve-stem. See cut under rock-drill. 
Thebesian valve. See Thebesian. Tricuspid valve. 
See tricuspid. Twin valve. See twin\. undershut 
valve, a valve placed beneath the sole-plate of a pump or 
other mechanism, as distinguished from one placed above 
the plate, and closed by a force acting from below upward. 
E. H. Knight. Valve of Amussa't. Same as Heister's 
valve. Valve of Bauhin. Same as ileocsecal valve. 
Valve of Hasner. See Homer's valve. Valve of Tari- 
nus. Same mvalve of Vieussens. Valve of Thebesius. 
See Thebesian valve. Valve Of Tulpius. Same as ileo- 
csecal valve. Valve of Varolius. Same as Ueoc fecal valve. 
Valve Of Vieussens the delicate transparent roof of 
the anterior part of the fourth ventricle, continuous ante- 
riorly with the postoptici, posteriorly with the cerebellum ; 
the superior medullary velum. Valves of Kerkring, the 
valvula: conniventes of the intestine (which see, under 
valvula). Valves Of the heart. See coronary, mitral, 
semilunar (aortic, prdmonary), Thebesian, and tricuspid 
valve ; also cut under heart. Valves Of the lymphatics. 
See lymphatic, n. (with cut). Valves of the veins, 
folds of the lining membrane of the veins, most numer- 
ous in those of the lower extremities, which serve to 
impede or prevent the backward flow of blood in those 
vessels. 
valve-bucket (valv'buk'et), . A bucket fitted 
with a valve; specifically, a pump-bucket or 
sucker. 
Valve-chamber (valv'cham"ber), . The cham- 
ber in which a pump-valve or a steam-valve 
operates. See cuts under rock-drill, slide-valve, 
and steam-hammer. 
Valve-COCk (valv'kok), n. A form of cock or 
faucet which is closed by the dropping of a 
valve on its seat. E. H. Kniijlit. 
valve-coupling (valv'kupling), n. A pipe- 
coupling containing a valve. 
vamose 
valved (valvd), u. [< ralve + -(cfi.~\ Having 
a valve or valves, in any sense ; valvate ; val- 
vular. 
valve-file (valv'fil), w. A machinists' file hay- 
ing two acute and two obtuse angles, used in 
finishing valves, splines, feathers, key-ways, 
etc. E. H. Knight. 
valve-gear (valv'ger), n. Mechanism employed 
in operating a valve. 
valveless (valv'les), a. [< valve + -less.] Hav- 
ing no valve. 
valvelet (valv'let), w. [<t-/re + -let.] A lit- 
tle valve ; a valvule. 
valve-motion (valv'mo'shon), 11. Same as 
value-gear. 
valve-pallet (valv'pal"et), n. Same as pal- 
left, 5. 
valve-seat (valv'set). n. In mach., the surface 
upon which a valve rests. 
valve-stem (valv'stem), n. Arod like a piston- 
rod by which a valve is moved. See cuts un- 
der slide-valve, steam-engine, and passenger-en- 
gine. 
valve-tailed (valv'tald), a. Noting a Brazilian 
bat, Diclidunis albun, the end of whose tail 
occupies a valve-like formation of the inter- 
femoral membrane. 
valve-view (valv'vu), n. and a. I. . In bot., 
the valval aspect of a diatom. Also called side- 
view. See valvnl. 
II. a. Noting a position in which a valve- 
view is presented ; valval. 
valviferous (val-vif'e-rus). a. [< L. valva, 
valve, + ferre = E. bear 1 .] Bearing a valve ; 
provided with a valve or valvular parts. 
valviform (val'vi-form), a. [< L. valva, the leaf 
of a door (see valve), + forma, form.] Forming 
or acting as a valve; valvular; valvate. Also 
valveeform. 
valvula (val'vu-la), n. ; pi. valvulse (-le). [NL. : 
see valvvle.] In fl)W<.,same as valve Valvula 
Bauhini, the ileoctecal valve. Valvulse conniventes, 
transverse folds of the mucous membrane and underlying 
tissues found throughout a large extent of the small in- 
testine. Their use is probably to retard somewhat the pas- 
sage of the alimentary mass, and at the same time to of- 
fer a greater surf ace for absorption. Valvula Heisteri, 
folds of the mucous membrane, in the neck of the gall- 
bladder and in the cystic duct, which present the appear- 
ance of a spiral valve. See cut under stomach. Valvula 
Vleussensii, the valve of Vieussens (which see, under 
valve). 
valvular (val'vu-lar), a. [< valvule + -or 8 .] 
Of or pertaining to a valve or valvula; also, 
having the character of a valve ; valviform. 
Valvular disease, disease of one or more of the valves 
of the heart. Valvular Sinus. See sinus. 
valvule (val'vul), n. [< F. valvule; < L. val- 
vola, valvula, dim. of ralva, the leaf of a door, 
etc. : see valve.'] 1. A little valve. Specifically 
(a) In anat.: (1) The valvula or valve of Vieussens. (2) 
One of the valvulee conniventes. (6) In bot., a name for- 
merly given to the inner or flowering glumes of grasses. 
(c) In entom., a corneous piece at the base of the haustel- 
lum of sucking insects, corresponding to the labrnm in 
the mandibulate mouth. Kirby and Spence. Interven- 
tricular valvules. See interventricular. 
valvulitis (val-vu-li'tis), n. [NL., < valvula 
+ -itis.] Inflammation of the tissues form- 
ing a valve, usually one of the valves of the 
heart. 
vambrace (vam'bras), w. [Also vantbrace, vant- 
bras, vauntbrace; abbr. < F. avant-bras,< avant, 
before, in front, + bras, arm : see t'aw 2 , avant, 
and brace 1 .] The piece of armor which pro- 
tects the forearm from the elbow-joint to the 
wrist, whether covering the outer part of the 
arm only and worn over the sleeve of mail 
(compare garde-bras and brassart), or inclosing 
the whole forearm in a cylinder of iron. See 
cut under rcrebrace. 
vambraced (vam'brast), a. [< rambrace + 
-erf 2 .] Incased in armor: said of an arm, espe- 
cially when used in heraldry as a bearing. Also 
umbraccd. 
vamose (va-mos'), v. i. and t. ; pret. and pp. ra- 
mosed, ppr. vamosing. [< Sp. vamos, 1st pers. 
pi. pres. ind. (acting as 1st and 2d pi. impv.), 
used with inf. ir, go; < L. vadimus, 1st pers. pi. 
ind. of vadere, go, = E. wade : see wade.] To be 
off; be gone; decamp from. [Slang.] 
Paul had no such visions ; he did not see human lives 
as pictures, as tableaux-vivants. He was sincerely sorry 
that Hollis had vamosed in that way. 
C. F. Woolson, Jupiter Lights, xxxi. 
The inclination to adopt Spanish or Mexican terms, or 
osing, 
r., X. 
, 
terms derived from them, is shown also in vamosing, dis- 
appearing or running away. -V. and Q., 6th ser., X. 428. 
To vamose the ranch, to clear out ; decamp. [Slang, 
U. S.j 
My precious partners had vamosed the ranch. 
The Century, XVII. 82. 
