Hexad

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hexad \Hex"ad\, n. [L. hexas, hexadis, the number six, Gr. ?, ?,
     fr. "e`x six.] (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.


     [1913 Webster]

From WordNet (r) 2.0 [wn]:

  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}]