- row pitch
- row column
- readmission
- rubbing
- risk of exposure
- riskless
- risk arbitrage
- risk neck
- risk of life
- risk of infection
- risk free
- rising trot
- robert floyd curl jr.
- robert curl
- robert f. curl
- red ink
- rejected
- revenge for blood
- remuda
- requiring close attention
- reflecting on
- restraint dose
- restraint of trade
- restraining or suspending the breath during the mental recitation of the name of a deity or as a religious or yogic exercise
- requirements
- reclining chair
- readjust
- reading teacher
- Robert Indiana
- request stop
- requester
- retentive
- remotion
- removal
- reaper (of the crops)
- relating to the harvest
- rent (of land)
- rickettsia provazeki
- rickettsia orientalis
- rickettsia like organisms
- rickettsia mooseri
- ring rot bacteria
- rickettsia rickettisi
- rickettsia quintana
- ratbite fever bacterium
- rh isoagglutinin
- reticular formation
- rf hazards
- rfd
- red brigades