| 释义 |
multivalve, a. and n.|ˈmʌltɪvælv|
[ad. mod.L. multivalvis (cf. Linnæus's division Multivalvia): see multi- and valve. In French 1752.]
A. adj.
a. Conch. Having many valves, as the chitons and the acorn-shells.
1755Gentl. Mag. XXV. 32. 1774 Goldsm. Nat. Hist. VII. 61 Multivalve Shell-fish may be considered as animals shut up in round boxes. 1828Stark Elem. Nat. Hist. II. 122 The shell of the Cirripeda is always multivalve. 1877Huxley Anat. Inv. Anim. vi. 291 The former firmly fixed by the base of its multivalve conical shell.
b. Bot. and Ent. (See quots.)
1819G. Samouelle Entomol. Compend. 353 Rostrum..Multivalve, forming a tube by means of many valves uniting. 1819Pantologia, Multivalve glume... Having more than two valves. 1826Kirby & Sp. Entomol. IV. 373 Tail of the female without a terebrant, or pungent multivalve ovipositor. 1831Macgillivray tr. Richard's Elem. Bot. 274 A Pericarp is..Multivalve, when it divides into a greater number of valves or distinct segments.
c. Electronics. Having many thermionic valves.
1920Wireless World Jan. 574/2 More than one valve may be connected in cascade to form a multi-valve amplifier. 1957Ibid. July 310 (heading) Multi-valve cathode follower circuits.
B. n. A multivalve shell; an animal having such a shell (as a chiton or an acorn-shell).
1753Chambers Cycl. Supp. 1776Da Costa Elem. Conchol. 242 Multivalves. Shells composed of many pieces or valves. 1851Woodward Mollusca 36 Most of the multivalves of old authors were articulate animals.
Also multiˈvalvate (rare—0), ˈmultivalved, multiˈvalvular adjs. = multivalve a.
1891Syd. Soc. Lex., *Multivalvate, having more than two valves.
1758Ellis in Phil. Trans. I. 846 A *multivalved shell, composed of unequal valves. 1774Goldsm. Nat. Hist. VII. 18 The Multivalved [shell-fish], or those of the Acorn-shell Kind. 1826Good Bk. Nat. II. 20 Of the multivalved testaceous worms..there are but three known species, the chiton, the lepas..and the phloas.
1760J. Lee Introd. Bot. ii. xxxiii. (1765) 159 Antirrhinum, with *multivalvular Fruit. 1849Balfour Man. Bot. §530 The fruit being univalvular, bivalvular, or multivalvular, &c., according as there are one, two, or many valves. |