| 释义 |
bivalve, a. and n.|ˈbaɪvælv|
[f. bi- prefix2 1 + valve, ad. L. valvæ folds of a door, folding-doors.]
A. adj.
1. Having two leaves or folding parts, as a shutter or door.
1677Plot Oxfordsh. 271 Great bivalve wooden Windows. a1877Knight Dict. Mech. s.v. Speculum, Webber's magnifying bivalve ear-speculum. 1908Practitioner Aug. 284 There was no appreciable difference obtained in the results by using a bivalve speculum in order to avoid contact with the external meatus.
2. Zool. Having two shells united by a hinge.
1661Lovell Hist. Anim. & Min. Introd., Fishes which are..bivalve, as the Chama, oister, pectines. 1756C. Lucas Ess. Waters III. 123 Several small bivalve shells. 1848Carpenter Anim. Phys. 33 The ligament which holds together the shells of the bivalve Mollusca.
3. Bot. (A seed vessel) Having two valves.
1737Miller Gard. Dict. s.v. Chelidonium majus, The Flowers..are succeeded by many bivalve Pods. 1794Martyn Rousseau's Bot. xvi. 191 The capsule bivalve.
B. n.
1. pl. Folding-doors. Obs. exc. Hist.
1832Gell Pompeiana I. ii. 22 Doors seem to have been called bivalves where only formed of two folds.
2. Zool. A molluscous animal having a shell consisting of two halves joined together by an elastic ligament at the hinge, so as to open and shut like a book: such as the oyster, mussel, etc. Also the shell of such animal.
1683Phil. Trans. XIV. 507 Distinction of shells into Univalves Bivalves and Turbinated. 1771Ibid. LXI. 230 Four..species, like the sea bivalve. 1847Carpenter Zool. §876 Lamellibranchiata..To this group belong all ordinary bivalves. 1865Tylor Early Hist. Man. viii. 192 The refuse-mounds consist of oysters, mussels, and other bivalves.
3. Bot. A bivalve capsule or seed-vessel. |