• Heptad Definition & Synonyms
- (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.
• Hepta Definition & Synonyms
- () A combining form from Gr. "epta`, seven.
• Heptade Definition & Synonyms
- (n.) The sum or number of seven.