Search Result for "heptad": 
Wordnet 3.0

NOUN (1)

1. the cardinal number that is the sum of six and one;
[syn: seven, 7, VII, sevener, heptad, septet, septenary]

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2 definitions retrieved:

The Collaborative International Dictionary of English v.0.48:

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. [1913 Webster]
WordNet (r) 3.0 (2006):

heptad n 1: the cardinal number that is the sum of six and one [syn: seven, 7, VII, sevener, heptad, septet, septenary]