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3 definitions found

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

 hexad
 六,六個一組,六價原子

From: Webster's Revised Unabridged Dictionary (1913)

 Hex·ad n.  chem. An atom whose valence is six, and which can be theoretically combined with, substituted for, or replaced by, six monad atoms or radicals; as, sulphur is a hexad in sulphuric acid. Also used as an adjective.
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From: WordNet (r) 2.0

 hexad
      n : the cardinal number that is the sum of five and one [syn: six,
           6, VI, sixer, sise, Captain Hicks, half a
           dozen, sextet, sestet, sextuplet]