英语词汇sigmoid的起源、历史背景-英语词源词典

词汇	sigmoid
词源	sigmoid adj. "shaped like the Greek letter sigma" in one of its forms, hence either "shaped like a C" (1660s) or "shaped like an S" (1786). From sigma (q.v.) + -oid. Especially of the flexure of the colon (1891). Related: Sigmoidal; sigmoidally. Entries linking to sigmoid sigma 18th letter of the Greek alphabet, corresponding to Latin S; the name is a metathesis of Hebrew samekh. In uncial writing, shaped like an S or a C. -oid word-forming element meaning "like, like that of, thing like a ______," from Latinized form of Greek -oeidēs (three syllables), from eidos "form," related to idein "to see," eidenai "to know;" literally "to see" (from PIE weid-es-, from root weid- "to see"). The -o- is connective or a stem vowel from the previous element. Often implying an incomplete or imperfect resemblance to the thing indicated. sigmoidoscope n. "speculum for examining the lower bowels," 1895, from sigmoid (q.v.) in the colonic sense + -scope, with connective -o-. Related: Sigmoidoscopy. updated on October 12, 2022
随便看	unglue ungodly ungovernable ungoverned ungraceful ungracious ungrammatical ungrateful ungual unguarded unguent unguided ungulate unhallowed unhampered unhand unhappily unhappiness unhappy unharmed unharness unhealthy unheard unheeded unhelpful

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sigmoid adj.