Reference meaning
R
Last updated
a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
Related source terms
Other meanings
2. noun
(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
3. noun
the 18th letter of the Roman alphabet
4. noun
the length of a line segment between the center and circumference of a circle or sphere
Source and scope
This definition is reproduced from Princeton WordNet 3.0, sense 13646031-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.