Bible Dictionaries
Thionic

Webster's Dictionary

(a.) Of or pertaining to sulphur; containing or resembling sulphur; specifically, designating certain of the thio compounds; as, the thionic acids. Cf. Dithionic, Trithionic, Tetrathionic, etc.

Bibliography Information
Webster, Noah. Entry for 'Thionic'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/thionic.html. 1828.