| 单词 | valve |
| 释义 | valve —valveless, adj. —valvelike, adj. /valv/, n. , v. , valved, valving. n. 1. any device for halting or controlling the flow of a liquid, gas, or other material through a passage, pipe, inlet, outlet, etc. 2. a hinged lid or other movable part that closes or modifies the passage in such a device. 3. Anat. a membranous fold or other structure that controls the flow of a fluid, as one that permits blood to flow in one direction only. 4. (in musical wind instruments of the trumpet class) a device for changing the length of the air column to alter the pitch of a tone. 5. Zool. a. one of the two or more separable pieces composing certain shells. b. either half of the silicified shell of a diatom. 6. Bot. a. one of the segments into which a capsule dehisces. b. a flap or lidlike part of certain anthers. 7. Electronics. Chiefly Brit. See vacuum tube (def. 1). 8. Archaic. one of the leaves of a double or folding door. v.t. 9. to provide with a means of controlling the flow of liquid, gas, etc., by inserting a valve. [1350-1400; ME < L valvae leaves of a door] |
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