'Heptavalent' definitions:
Definition of '
Heptavalent
'
From:
GCIDE
Heptavalent \Hep*tav"a*lent\, a. [Hepta- + L. valens, p. pr. See
Valence
.] (Chem.) Having seven units of attractive force or affinity; -- said of heptad elements or radicals. [1913 Webster]
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