- rothko
- r_ कोनिसीन
- republic of korea
- richard iii
- respiratory accident
- relative potency
- red_striped
- red_streaked
- rotary tablet machine
- riemann
- republic of seychelles
- random access system
- royal stag
- rhodophyta
- reflex neurogenic venoconstriction
- record format
- record medium
- record length
- renal albuminuria
- rectal constipation
- renal tubule
- retinal ischaemia
- river shad
- rhombic sulphur
- risus
- republic of fiji
- radical nephrectomy
- radical surgery
- radiation proctosigmoiditis
- radioulnar
- retrospectively
- record cover
- reticuloendothelial system
- rivalrous
- reportable
- renal dwarfism
- radial dynamic
- reported
- rheumatic myocarditis
- relative coding
- round (as of a police patrol)
- resentment
- regional language
- random amplified polymorphic
- rim blight
- right to left shunt
- ring_around_a_rosy
- ring_around_the_rosy
- rectal nerve
- routing code