Rt
Right
R
Respiration
Rectal
Ra
Radium
RBC
Red blood cell
RDA
Recommended
Daily
Allowance
REM
Rapid
Eye
Movement
RHD
Rheumatic
Heart
Disease
RLQ
Right
Lower
Quadrant
RN
Registered
Nurse
RNA
Ribonucleic
Acid
R/O
Rule
Out
RO
Reality
Orientation
ROM
Range
Of
Motion
RR
Recovery
Room
RRT
Registered respiratory Therapist
Registered Radiologic Technologist
RT
Respiratory Therapy/Therapist
RUQ
Right Upper Quadrant
Rx
Prescription, take, treatment