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最近这段时间总有小伙伴问小编biennial是什么意思_biennial的用法是什么，小编为此在网上搜寻了一些有关于biennial是什么意思_biennial的用法的知识送给大家，希望能解答各位小伙伴的疑惑。

一、biennial是什么意思

1、biennial 两年一次的

2、前缀bi-, 二。词根enn, 年。

二、biennial的用法

1、biennial (adj.)

2、"lasting for two years"(1620s);"occurring every two years"(1750), from Latin biennium"two-year period,"from bi- (see bi-) + annus"year"(see annual). The vowel change is"due to the Latin phonetic law according to which the unaccented and closed radical syllable of the second element of compounds, original -ă- becomes -ĕ-"[Klein]. The noun meaning"a biennial plant"is attested by 1770.

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