CAESIUMS
- rare, highly reactive, soft, metallic element of the alkali metal group, used chiefly in photoelectric cells. Symbol: Cs; at. wt.: 132.905; at. no.: 55; sp. gr.: 1.9 at 20-¦C; melts at 28.5-¦C
- CAESIUM, a metallic element [n]
- CAESIUM, cesium (a metallic element) [n]