| / English Dictionary |
VALVE
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
One of the paired hinged shells of certain molluscs and of brachiopods
Classified under:
Hypernyms ("valve" is a kind of...):
shell (the hard largely calcareous covering of a mollusc or a brachiopod)
Sense 2
Meaning:
The entire one-piece shell of a snail and certain other molluscs
Classified under:
Nouns denoting animals
Hypernyms ("valve" is a kind of...):
shell (the hard largely calcareous covering of a mollusc or a brachiopod)
Sense 3
Meaning:
Control consisting of a mechanical device for controlling the flow of a fluid
Classified under:
Nouns denoting man-made objects
Hypernyms ("valve" is a kind of...):
control; controller (a mechanism that controls the operation of a machine)
Meronyms (parts of "valve"):
handwheel (control consisting of a wheel whose rim serves as the handle by which a part is operated)
handwheel (a wheel worked by hand)
Hyponyms (each of the following is a kind of "valve"):
accelerator; throttle; throttle valve (a valve that regulates the supply of fuel to the engine)
ball valve (any valve that checks flow by the seating of a ball)
butterfly valve (a valve in a carburetor that consists of a disc that turns and acts as a throttle)
choke (a valve that controls the flow of air into the carburetor of a gasoline engine)
clack; clack valve; clapper valve (a simple valve with a hinge on one side; allows fluid to flow in only one direction)
exhaust valve (a valve through which burned gases from a cylinder escape into the exhaust manifold)
intake valve (a valve that controls the flow of fluid through an intake)
poppet; poppet valve (a mushroom-shaped valve that rises perpendicularly from its seat; commonly used in internal-combustion engines)
escape; escape cock; escape valve; relief valve; safety valve (a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level)
slide valve (valve that opens and closes a passageway by sliding over a port)
Derivation:
valvelet (a small valve)
valvular (relating to or operating by means of valves)
Sense 4
Meaning:
Device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
Classified under:
Nouns denoting man-made objects
Hypernyms ("valve" is a kind of...):
device (an instrumentality invented for a particular purpose)
Holonyms ("valve" is a part of...):
brass; brass instrument (a wind instrument that consists of a brass tube (usually of variable length) that is blown by means of a cup-shaped or funnel-shaped mouthpiece)
Derivation:
valvelet (a small valve)
Sense 5
Meaning:
A structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
Classified under:
Hypernyms ("valve" is a kind of...):
anatomical structure; bodily structure; body structure; complex body part; structure (a particular complex anatomical part of a living thing and its construction and arrangement)
Hyponyms (each of the following is a kind of "valve"):
cardiac valve; heart valve (a valve to control one-way flow of blood)
valvelet; valvula; valvule (a small valve)
ileocecal valve (valve between the ileum of the small intestine and the cecum of the large intestine; prevents material from flowing back from the large to the small intestine)
Holonyms ("valve" is a part of...):
heart; pump; ticker (the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body)
Derivation:
valvelet (a small valve)
valvular (relating to or operating by means of valves)
Context examples:
A dual-flap valve of the heart that regulates the flow of blood between the left atrium and the left ventricle of the heart.
(Mitral Valve, NCI Thesaurus)
A heart disorder characterized by a defect in aortic valve structure or function.
(Aortic Valve Disorder, NCI Thesaurus)
A disorder characterized by a defect in aortic valve function or structure.
(Aortic Valve Disorder, NCI Thesaurus/CTCAE)
A gel preparation, with metered dose valves, which allow for the delivery of a uniform quantity of gel upon each activation.
(Metered Gel Dosage Form, NCI Thesaurus/CDISC)
A gel contained in a device with valves that permits the release of a uniform dose of gel that composed of active and/or inert ingredient(s) upon activation.
(Metered Gel Dosage Form, NCI Thesaurus)
A powder contained in a device with valves that permits the dispensing of active and/or inert ingredient(s) upon activation.
(Metered Powder Dosage Form, NCI Thesaurus)
An event causes abnormal valve function; this is usually a tear in leaflet or chordae tendinae and manifests as a new regurgitant.
(Cardiac Valve Injury, NCI Thesaurus/ACC)
The valve between the left atrium and left ventricle of the heart.
(Mitral Valve, NLM, Medical Subject Headings)
An aerosol contained in a device with valves that permits the release of a specified quantity of active and/or inert ingredient(s) upon activation.
(Metered Aerosol Dosage Form, NCI Thesaurus)
A spray that is packaged under pressure and released upon activation of an appropriate valve system.
(Aerosol Spray Dosage Form, NCI Thesaurus)
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