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heptad: Meaning and Definition of

hep•tad

Pronunciation: (hep'tad), [key]
— n.
  1. the number seven.
  2. a group of seven.
  3. an element, atom, or group having a valence of seven.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
heptachord heptagon
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