| 释义 |
bivoltine, a.|baɪˈvɒltɪn|
Also -in.
[a. F. bivoltin, f. bi-, bi-2 + It. volta time.]
Of certain silkworms: producing two broods per annum. Also as n.
1874[see multivoltine s.v. multi- 1 a]. 1888E. A. Butler Silkworms 69 Most of the other species produce two, three, four, six, or even eight broods per annum, and in the commercial world are..distinguished as ‘bivoltins’, ‘trivoltins’, ‘quadrivoltins’, etc. 1932Proc. 6th Internat. Congress Genetics I. 377 The bivoltine breeds also show less growth than the univoltine ones. |