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more about heptad
heptad |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Heptad \Hep"tad\, n. [L. heptas the number seven Gr ?, ?, fr "epta` seven.] (Chem.) An atom which has a valence of seven and which can be theoretically combined with substituted for or replaced by seven monad atoms or radicals; as iodine is a heptad in iodic acid. Also used as an adjective. From WordNet r 1.6 [wn]: heptad n : the cardinal number that is the sum of six and one [syn: {seven}, {7}, {VII}, {sevener}, {septet}]
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