rrr

/R R/
noun
  1. 1

    (cardiology) Acronym of regular rate and rhythm, used to describe the heartbeat of patient.

  2. 2

    (epidemiology) Initialism of relative risk reduction.

  3. 3

    (cricket) Initialism of required run rate. [(cricket) The average number of runs per over that the batting side must achieve in order to win the present match.]