heptavalent

 : 
Adjective
 : 
hep=tav=a=lent

CIDE DICTIONARY

heptavalenta. [Hepta- + L. valens, p. pr. See Valence.].
     Having seven units of attractive force or affinity; -- said of heptad elements or radicals.  [1913 Webster]

OXFORD DICTIONARY

heptavalent, adj. Chem. having a valency of seven; septivalent.


For further exploring for "heptavalent" in Webster Dictionary Online


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