heptad
Noun
Meaning
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.
Source: Webster's dictionarySynonyms
seven
vii
septet
septenary
7
sevener
atom
sevens
week
radical
hebdomad
septemvir
septemvirate
septiform
septenarius
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