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Definitions for: Heptad
[n] the cardinal number that is the sum of six and one
Webster (1913) Definition: 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.
Synonyms: 7, septet, seven, sevener, VII
See Also: digit, figure
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