Bible Dictionaries
Hexad

Webster's Dictionary

(n.) An atom whose valence is six, and which can be theoretically combined with, substituted for, or replaced by, six monad atoms or radicals; as, sulphur is a hexad in sulphuric acid. Also used as an adjective.

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