English Dictionary: dyad | by the DICT Development Group |
3 results for dyad | |
From WordNet (r) 3.0 (2006) [wn]: | |
From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
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. 2. (Chem.) An element, atom, or radical having a valence or combining power of two. | |
From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
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}. |