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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Heptad \Hep"tad\, noun [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) 2.0 [wn]:
heptad
noun: the cardinal number that is the sum of six and one [syn: {seven}, {7}, {VII}, {sevener}, {septet}]
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Definitions retrieved from local copies of the freely distributed DICT client/server software and databases. Click here for database copyright information. - KM |