1. (noun)
roentgen, 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 Synonyms: gas constant, radius, roentgen, universal gas constant
2. (noun)
gas constant, universal gas constant, R
- (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole Synonyms: gas constant, radius, roentgen, universal gas constant
3. (noun)
R, r
- the 18th letter of the Roman alphabet Synonyms: gas constant, radius, roentgen, universal gas constant
4. (noun)
radius, r
- the length of a line segment between the center and circumference of a circle or sphere Synonyms: r, radius, gas constant, universal gas constant, roentgen, spoke, wheel spoke
Synonyms of 'r':
