transcription, транскрипция: [ ˈvalv ]
noun
Etymology: Latin valva; akin to Latin volvere to roll — more at voluble
Date: 14th century
1. archaic : a leaf of a folding or double door
2.
[New Latin valva, from Latin]
: a bodily structure (as the mitral valve) that closes temporarily a passage or orifice or permits movement of fluid in one direction only
3.
a. : any of numerous mechanical devices by which the flow of liquid, gas, or loose material in bulk may be started, stopped, or regulated by a movable part that opens, shuts, or partially obstructs one or more ports or passageways ; also : the movable part of such a device
b. : a device in a brass instrument for quickly channeling air flow through an added length of tube in order to change the fundamental tone by some definite interval
c. chiefly British : electron tube
4.
[New Latin valva, from Latin]
: one of the distinct usually hinged and movable pieces of which the shell of some shell-bearing animals (as lamellibranch mollusks, brachiopods, and barnacles) consists
5.
[New Latin valva, from Latin]
a. : one of the segments or pieces into which a dehiscing capsule or legume separates
b. : the portion of various anthers (as of the barberry) resembling a lid
c. : one of the two encasing membranes of a diatom
• valved ˈvalvd adjective
• valve·less ˈvalv-ləs adjective