valve 音标拼音: [v'ælv]
n . 活瓣,阀,活门
vt .
vi . 装阀,用阀调节
活瓣,阀,活门装阀,用阀调节
valve 阀
valve n 1 :
a structure in a hollow organ (
like the heart )
with a flap to insure one -
way flow of fluid through it 2 :
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone 3 :
control consisting of a mechanical device for controlling the flow of a fluid 4 :
the entire one -
piece shell of a snail and certain other molluscs 5 :
one of the paired hinged shells of certain molluscs and of brachiopods Valve \
Valve \,
n . [
L .
valva the leaf ,
fold ,
or valve of a door :
cf .
F .
valve .]
[
1913 Webster ]
1 .
A door ;
especially ,
one of a pair of folding doors ,
or one of the leaves of such a door .
[
1913 Webster ]
Swift through the valves the visionary fair Repassed . --
Pope .
[
1913 Webster ]
Heavily closed , . . .
the valves of the barn doors .
--
Longfellow .
[
1913 Webster ]
2 .
A lid ,
plug ,
or cover ,
applied to an aperture so that by its movement ,
as by swinging ,
lifting and falling ,
sliding ,
turning ,
or the like ,
it will open or close the aperture to permit or prevent passage ,
as of a fluid .
[
1913 Webster ]
Note :
A valve may act automatically so as to be opened by the effort of a fluid to pass in one direction ,
and closed by the effort to pass in the other direction ,
as a clack valve ;
or it may be opened or closed by hand or by mechanism ,
as a screw valve ,
or a slide valve .
[
1913 Webster ]
3 . (
Anat .)
One or more membranous partitions ,
flaps ,
or folds ,
which permit the passage of the contents of a vessel or cavity in one direction ,
but stop or retard the flow in the opposite direction ;
as ,
the ileocolic ,
mitral ,
and semilunar valves .
[
1913 Webster ]
4 . (
Bot .)
(
a )
One of the pieces into which a capsule naturally separates when it bursts .
(
b )
One of the two similar portions of the shell of a diatom .
(
c )
A small portion of certain anthers ,
which opens like a trapdoor to allow the pollen to escape ,
as in the barberry .
[
1913 Webster ]
5 . (
Zool .)
One of the pieces or divisions of bivalve or multivalve shells .
[
1913 Webster ]
{
Air valve }, {
Ball valve }, {
Check valve },
etc .
See under {
Air }. {
Ball }, {
Check },
etc .
{
Double -
beat valve },
a kind of balance valve usually consisting of a movable ,
open -
ended ,
turban -
shaped shell provided with two faces of nearly equal diameters ,
one above another ,
which rest upon two corresponding seats when the valve is closed .
{
Equilibrium valve }.
(
a )
A balance valve .
See under {
Balance }.
(
b )
A valve for permitting air ,
steam ,
water ,
etc .,
to pass into or out of a chamber so as to establish or maintain equal pressure within and without .
{
Valve chest } (
Mach .),
a chamber in which a valve works ;
especially (
Steam Engine ),
the steam chest ; --
called in England {
valve box },
and {
valve casing }.
See {
Steam chest },
under {
Steam }.
{
Valve face } (
Mach .),
that part of the surface of a valve which comes in contact with the {
valve seat }.
{
Valve gear },
or {
Valve motion } (
Steam Engine ),
the system of parts by which motion is given to the valve or valves for the distribution of steam in the cylinder .
For an illustration of one form of valve gear ,
see {
Link motion }.
{
Valve seat }. (
Mach .)
(
a )
The fixed surface on which a valve rests or against which it presses .
(
b )
A part or piece on which such a surface is formed .
{
Valve stem } (
Mach .),
a rod attached to a valve ,
for moving it .
{
Valve yoke } (
Mach .),
a strap embracing a slide valve and connecting it to the valve stem .
[
1913 Webster ]
48 Moby Thesaurus words for "
valve ":
aerophone ,
ball cock ,
ball valve ,
bell ,
bung ,
bunghole ,
check valve ,
cock ,
cork ,
discharge tube ,
double reed ,
drain cock ,
draw cock ,
embouchure ,
faucet ,
gate ,
horn ,
key ,
lid ,
lip ,
mouthpiece ,
needle valve ,
peg ,
petcock ,
pin ,
pipe ,
plug ,
radio tube ,
reed ,
sea cock ,
slide ,
spigot ,
spike ,
spile ,
spill ,
stop ,
stopcock ,
stopgap ,
stopper ,
stopple ,
tap ,
tooter ,
tube ,
vacuum tube ,
valvula ,
valvule ,
wind ,
wind instrument
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Valve(英语单词)_百度百科 Valve是英语中的多义词,主要作名词和动词使用。 名词核心含义指控制流体或物质流动的装置,包括机械阀门、心脏瓣膜、电子真空管等实体;动词表示安装或调节此类装置。