English

Definition of caesium noun from the Oxford Advanced Learner's Dictionary

 

caesium

 noun
(British English) (North American English cesium) noun
BrE BrE//ˈsiːziəm//
 
; NAmE NAmE//ˈsiːziəm//
 
[uncountable] (symbol Cs)
 
jump to other results
a chemical element. Caesium is a soft silver-white metal that reacts strongly in water, used in photoelectric cells. Word Originmid 19th cent.: from Latin caesius ‘greyish-blue’ (because it has characteristic lines in the blue part of the spectrum).

Other results

All matches