<chemistry> 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.

Origin: L. Heptas the number seven. Gr, fr. "epta seven.

(01 Mar 1998)

hepper, hepta-, heptachlor, heptachlor epoxide < Prev | Next > heptad repeat, heptagon, heptagonal

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