Di- (prefix)
Di- comes straight from the Greek and means twice or double or twofold, as in diacid, diamelia (absence of two limbs), diandry (double male genetic contribution) and digyny (double female genetic contribution); the drugs diazepam, dicyclomine (Bentyl), and diethylstilbestrol (DES); etc.

Medical dictionary. 2011.

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  • di- — 1 [disdī] [Gr di < dis , twice < IE * dwis (> L bis, MHG zwis) < base * dwo, TWO] prefix 1. twice, double, twofold [dichroism, dicotyledon] 2. Chem. having two atoms, molecules, radicals, etc. [diacid]: see BI 1 (sense 8): Also prefix …   English World dictionary

  • di- — [daı, dı] prefix [: Greek; Origin: two ] two, twice, or double ▪ A diphthong is a vowel made up of two sounds. →↑semi , ↑bi , ↑tri …   Dictionary of contemporary English

  • di- — [daı, dı] prefix [: Greek; Origin: two ] two, twice, or double ▪ A diphthong is a vowel made up of two sounds. →↑semi , ↑bi , ↑tri …   Dictionary of contemporary English

  • di- — 1 [dʌɪ, di] combining form twice; two ; double: dichromatic. ↘Chemistry containing two atoms, molecules, or groups of a specified kind: dioxide. Origin from Gk dis twice . di 2 [di, dʌɪ] …   English new terms dictionary

  • Di — may refer to: The diminutive form of the name Diana, Diane and Dianne. Dai is the Welsh diminutive form of the name David. Diana, Princess of Wales. Di (ethnic group) (氐), an ancient ethnic group in China. di , a Greek numerical prefix meaning… …   Wikipedia

  • Di- — [Gr. di s twice; akin to ? two, L. bis twice. See {Two}, and cf. {Bi }, {Dia }. The L. pref. dis sometimes assumes the form di . See {Dis }.] A prefix, signifying twofold, double, twice; (Chem.) denoting two atoms, radicals, groups, or… …   The Collaborative International Dictionary of English

  • di- — 1 a prefix occurring in loanwords from Greek, where it meant two, twice, double (diphthong); on this model, freely used in the formation of compound words (dicotyledon; dipolar) and in chemical terms (diatomic; disulfide). Also, dis 2. Cf. mono …   Universalium

  • di- — [ daı ] prefix two or twice: used with some adjectives and nouns: carbon dioxide (=containing two oxygen atoms) …   Usage of the words and phrases in modern English

  • di- — (prefix) two, twice …   Dictionary of ichthyology

  • di- — prefix two; twice; double: A diphthong is a vowel made up of two sounds. compare semi, see also: bi­, tri­ …   Longman dictionary of contemporary English

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