bivoltineadj.
/bʌɪˈvɒltɪn/ Of certain silkworms: producing two broods per annum. Also as n.
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the world > animals > invertebrates > phylum Arthropoda > class Insecta > Heterocera > [adjective] > producing two broods a year
bivoltine1872
the world > animals > invertebrates > phylum Arthropoda > class Insecta > Heterocera > [noun] > family Bombycidae > genus Bombyx > silk moth > caterpillar of bombyx mori or silkworm > characterized by number of broods
bivoltine1872
univoltine1872
quadrivoltine1888
trivoltin1888
polyvoltine1890
1872 J. Geoghegan Silk in India i. 23 In 1866 experiments were tried..with so-called Japan bivoltine and multivoltine seed.
1887 J. Paton in Encycl. Brit. XXII. 58/1 The common silkworm produces as a rule only one generation during the year; but there are races in cultivation which are bivoltine, or two-generationed, and some are multivoltine.
1888 E. 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.
1932 Proc. 6th Internat. Congress Genetics I. 377 The bivoltine breeds also show less growth than the univoltine ones.
This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2020).
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adj.1872