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5 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 tet·rad /ˈtɛˌtræd/

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 tet·rad /ˈtɛˌtræd/ 名詞

From: Taiwan MOE computer dictionary


From: Webster's Revised Unabridged Dictionary (1913)

 Tet·rad n.
 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) 2.0

      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]