(definition) by Webster 1913 Wed Dec 22 1999 at 0:07:30

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.

 

© Webster 1913.

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