Definition of r
English to English noun - a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
source: WordNet 3.0 - (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
source: WordNet 3.0 - the 18th letter of the Roman alphabet
source: WordNet 3.0 - the length of a line segment between the center and circumference of a circle or sphere
source: WordNet 3.0 English to Tagalog source: Diccionario Ingles-Español-Tagalog
Visual Synonyms 
Nearby Word
r, rh, ra, ri, ro, ru, re, r-2, row, rho, rei, rew, ree, rye, roy, ray, raw, rue, rio, rie
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