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 ]
n. [ L. dyas, dyadis, the number two. Gr. &unr_;: 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 ]
n. pl.; sing. Dyak. (Ethnol.) The aboriginal and most numerous inhabitants of Borneo. They are partially civilized, but retain many barbarous practices. [ 1913 Webster ]
‖n. [ L. dyas the number two. ] (Geol.) A name applied in Germany to the Permian formation, there consisting of two principal groups. [ 1913 Webster ]
[しょうみょう, shoumyou] (n) (1) (See 五明) sabdavidya (ancient Indian linguistic and grammatical studies); (2) { Buddh } chanting of Buddhist hymns (usu. in Sanskrit or Chinese) #7,548[Add to Longdo]
[いん, in] (n) (1) cause; factor; (2) { Buddh } (See 縁・えん・5) hetu (direct cause, esp. as opposed to indirect conditions); (3) (See 因明) the basis of one's argument (in hetuvidya); (P) #13,383[Add to Longdo]
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