What is "r" in English? Definition and Explanations

Meaning of "r": a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air

Noun

Meaning of "r": (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole

Noun

Meaning of "r": the 18th letter of the Roman alphabet

Noun

Meaning of "r": the length of a line segment between the center and circumference of a circle or sphere

Noun