noun Etymology: New Latin, from Latin caesius bluish gray Date: 1861 a silver-white soft ductile element of the alkali metal group that is the most electropositive element known and that is used especially in photoelectric cells
CESIUM
Meaning of CESIUM in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012