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Definition of Heptad
1. Noun. The cardinal number that is the sum of six and one.
Exact synonyms: 7, Septenary, Septet, Seven, Sevener, Vii
Generic synonyms: Digit, Figure
Derivative terms: Seven
Generic synonyms: Digit, Figure
Derivative terms: Seven
Definition of Heptad
1. n. 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.
Definition of Heptad
1. a group of seven [n -S]
Medical Definition of Heptad
1.