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Definition of hexad:

  1. 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.


six-spot, sixer, captain hicks, sextuplet, half a dozen, sestet, VI, sise, sextet, six, sextette, sixsome, 6.