Bible Dictionaries
Heptavalent

Webster's Dictionary

(a.) Having seven units of attractive force or affinity; - said of heptad elements or radicals.

Bibliography Information
Webster, Noah. Entry for 'Heptavalent'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​h/heptavalent.html. 1828.