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dyad 音标拼音: [d'ɑɪ ,æd] n. 二数,一对,二元一位 二数,一对,二元一位 dyad二价元素 dyad n 1: two items of the same kind [ synonym: { couple}, { pair}, { twosome}, { twain}, { brace}, { span}, { yoke}, { couplet}, { distich}, { duo}, { duet}, { dyad}, { duad}] Dyad \ Dy" ad\, n. [ L. dyas, dyadis, the number two. Gr. ?: cf. F. dyade. See two, and cf. { Duad}.] 1. Two units treated as one; a couple; a pair. [ 1913 Webster] 2. ( Chem.) An element, atom, or radical having a valence or combining power of two. [ 1913 Webster]
Dyad \ Dy" ad\, a. ( Chem.) Having a valence or combining power of two; capable of being substituted for, combined with, or replaced by, two atoms of hydrogen; as, oxygen and calcium are dyad elements. See { Valence}. [ 1913 Webster] 21 Moby Thesaurus words for " dyad": both, brace, couple, couplet, distich, double harness, doublet, duad, duet, duo, match, mates, pair, set of two, span, team, the two, twain, two, twosome, yoke
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