Definition of Cs
Noun: Cs
- A soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal
- cesium [N. Amer], caesium [Brit, Cdn], atomic number 55
- The speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second
- speed of light, light speed
- The 3rd letter of the Roman alphabet
- C
Anagrams containing the word Cs