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r
 
Noun r has 4 senses
  1. roentgen, R - a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
    --1 is a kind of radioactivity unit
  2. gas constant, universal gas constant, R - (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
    --2 is a kind of constant
  3. R - the 18th letter of the Roman alphabet
    --3 is a kind of     letter, letter of the alphabet, alphabetic character
    --3 is a member of Roman alphabet, Latin alphabet
  4. radius, r - the length of a line segment between the center and circumference of a circle or sphere
    --4 is a kind of length
    --4 is a part of diameter, diam
    --4 has particulars: semidiameter; radius of curvature
r-rated r-tenn r-texas r-utah r. b. cattell r. buckminster fuller r. j. mitchell r.c. r r abid r acteur sels fondus r and b r d r d product r esigned r nesans r qzcxcxggchvhfhfgcfyccddftcdxd gffhvf hugffdfrvgfgfgf

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