英语词汇“perissad”的英英意思、用法、释义、翻译、读音、例句、短语、词组、英语词典-本地帮

单词

perissad

释义

perissad, n. (a.)|pəˈrɪsæd|
[mod. f. Gr. περισσ-ός superfluous, redundant, in Arith. uneven, odd (f. περί in sense ‘over, beyond’) + -ad.]
1. Chem. An element or radical whose quantivalency is represented by an odd number, as a monad, triad, or pentad; opp. to artiad. Also attrib. or as adj.
1870[see artiad].1877Watts Fownes' Chem. I. 257 Elements..of uneven equivalency,..are designated generally as perissads.Ibid. 258 In every saturated or normal compound..the sum of the perissad elements is always an even number.1893Syd. Soc. Lex., Perissad, Chem., having a valency which is represented by an odd number.
2. Zool. = perissodactyl (as adj.).
1893Syd. Soc. Lex., Perissad..Zoöl., belonging to the Perissodactyla.

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友情链接