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单词 -idan
释义

-idansuffix

Origin: Formed within English, by clipping or shortening. Etymons: arachnidan adj. and n. at arachnid n. Derivatives, fistulidan n., phalangidan n., serpulidan n. at serpula n. Derivatives, zygaenidan n. at zygaena n. Derivatives.
Etymology: < -idan (in e.g. arachnidan adj. and n. at arachnid n. Derivatives, fistulidan n., phalangidan n., serpulidan n. at serpula n. Derivatives, zygaenidan n. at zygaena n. Derivatives, etc.). Compare -idian suffix.The ending -idan occurs from at least the early 19th cent. in a large group of scientific nouns and adjectives formed with the suffix -an suffix, whose bases are either English plural nouns in -ida , or (more usually) scientific Latin plural nouns in -ida , -idae , or -ides (see -id suffix3). These denote or designate members of specific taxa. From the first half of the 19th cent., -idan was used on the model of these words to form a small number of nouns and adjectives (all technical terms in biology) within English: neritidan n., patellidan n., and (in late 19th cent., modelled on two scientific Latin taxa) polycystidan adj. Few formations in this element remain in common use.
Zoology.
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Forming a small number of nouns denoting, and adjectives designating, members of taxonomic groups.
This entry has been updated (OED Third Edition, November 2010; most recently modified version published online June 2021).
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