Bible Dictionaries
Caesium

Webster's Dictionary

(n.) A rare alkaline metal found in mineral water; - so called from the two characteristic blue lines in its spectrum. It was the first element discovered by spectrum analysis, and is the most strongly basic and electro-positive substance known. Symbol Cs. Atomic weight 132.6.

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