Cs — synonyms, definition

1. Cs (Noun)

atomic number 55 caesium cesium light speed* speeds of light

Cs (Noun) — A soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal.

Cs (Noun) — 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.

Cs (Noun) — The 3rd letter of the Roman alphabet.

alphabetic character* constants letters letters of the alphabet metal metallic element speeds velocities caesium 137 cesium 137 Latin alphabet* Roman alphabet* pollucite