RR, Rr or rr may refer to:

Arts and entertainmentEdit

Businesses and organizationsEdit


Science and technologyEdit

Biology and medicineEdit

  • RR, an Rh factor phenotype
  • RR, abbreviation for blood pressure measurements taken with a sphygmomanometer invented by Scipione Riva-Rocci
  • RR, abbreviation for the Relaxation Response, a natural autonomic response of the body induced by gently staying focused on a repetitive mental repetition of a word or phrase
  • RR interval (R wave to R wave interval), the inverse of heart rate
  • Risk ratio, or relative risk, in statistics and epidemiology
  • Respiratory rate, a vital sign

Other uses in science and technologyEdit


  • Rajasthan Royals, an Indian Premier League franchise
  • Ranchi Rhinos, a defunct Hockey India League franchise
  • Run rate, an average number of runs a batsman (or the batting side) scores in an over of 6 balls in cricket


Other usesEdit

  • Roraima (ISO 3166 code BR-RR), a state in Brazil

See alsoEdit