Bible Dictionaries
Thionyl

Webster's Dictionary

(n.) The hypothetical radical SO, regarded as an essential constituent of certain sulphurous compounds; as, thionyl chloride.

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