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Dictionary

  Definition of r
  1. the length of a line segment between the center and circumference of a circle or sphere
  2. the 18th letter of the Roman alphabet
  3. (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
  4. a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
Similar Words: radius, R, gas constant, universal gas constant, roentgen

 

Hyponyms: semidiameter, radius of curvature

 

Part Meronyms: diameter, diam

 

Member Meronyms: Roman alphabet, Latin alphabet

 

 
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