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tetrad |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Tetrad \Tet"rad\, n. [L. tetras, -adis, Gr ?, ?: cf F. t['e]trade.] 1. The number four a collection of four things a quaternion. 2. (Chem.) A tetravalent or quadrivalent atom or radical; as carbon is a tetrad. From WordNet r 1.6 [wn]: tetrad n : the cardinal number that is the sum of three and one [syn: {four}, {4}, {IV}, {quatern}, {quaternion}, {quaternary}, {quaternity}, {quartet}, {quadruplet}, {foursome}, {Little Joe}]
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