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biennial是什么意思(biennial的用法)

2022-05-23 12:50:02 来源: 用户: 

大家好,知识小编来为大家讲解下。biennial是什么意思,biennial的用法很多人还不知道,现在让我们一起来看看吧!

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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