Similar Words to R:

Gas Constant
Radius
Roentgen
Universal Gas Constant

Examples:

1. Who's R I want to call my daughter!

Definitions of R:

1. A unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
2. (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
3. The 18th letter of the Roman alphabet
4. The length of a line segment between the center and circumference of a circle or sphere