Society - Issues - R



Look up R in dictionary

R
n 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 [syn: {roentgen}, {R}]
2: (physics) the universal constant in the gas equation:
pressure times volume = R times temperature; equal to 8.3143
joules per kelvin per mole [syn: {gas constant}, {universal
gas constant}, {R}]
3: the 18th letter of the Roman alphabet [syn: {R}, {r}]
4: the length of a line segment between the center and
circumference of a circle or sphere [syn: {radius}, {r}]

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