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R

PRIMARY MEANINGS OF: R

1
 n
the 18th letter of the Roman alphabet
2
 n
(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
3
 n
a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
FULL DEFINITIONS OF: R
1

n the 18th letter of the Roman alphabet

Synonyms:
r
Type of:
alphabetic character, letter, letter of the alphabet
the conventional characters of the alphabet used to represent speech
2

n (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, universal gas constant
Type of:
constant
a number representing a quantity assumed to have a fixed value in a specified mathematical context
3

n 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:
roentgen
Type of:
radioactivity unit
a measure of radioactivity
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