| 单词 | valve |
| 释义 | valve n. 1. a device for controlling the passage of fluid through a pipe etc., esp. an automatic device allowing movement in one direction only. 2. Anat. & Zool. a membranous part of an organ etc. allowing a flow of blood etc. in one direction only. 3. Brit. = thermionic valve. 4. a device to vary the effective length of the tube in a brass musical instrument. 5. each of the two shells of an oyster, mussel, etc. 6. Bot. each of the segments into which a capsule or dry fruit dehisces. 7. archaic a leaf of a folding door. Derivatives valvate adj. valved adj. (also in comb.). valveless adj. valvule n. Etymology: ME f. L valva leaf of a folding door |
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