What does R stand for? The Free Dictionary

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Acronym Definition
R Right
R River
R Reverse (automatic transmissions)
R Republican
R Registered Trademark (usually written ®)
R Restricted Audiences – under 17 years of age not permitted without parent/guardian (movie rating)
R Are
R Real (Brazilian currency)
R Red
R Rate
R Required
R Run (baseball/softball)
R Request
R Receive
R Radio
R Range
R Ring
R Rare
R Received (logging abbreviation)
R Racing (car version)
R Risk Assessment
R Radio Operator
R Thursday (using one letter for each day of week)
R Russian (rabbit breed)
R Rural
R Relevant (polygraphy)
R Rear
R Resistance
R Router
R Set of Real Numbers (math)
R Romeo (aviation letter code)
R Restricted
R Radical (chemistry)
R Runner (Mic-O-Say, Heart of America Council, Boy Scouts of America)
R Routine
R Reliability
R Rex (Latin: King)
R Regina (Latin: Queen)
R Rain (weather reports)
R Reset
R Reject
R South African Rand (national currency)
R Routine (logging abbreviation)
R Rabbi
R Radius
R Reuters
R Rookie (sports)
R Reprint
R Manitoba (postal code designation, Canada)
R Respectfully (closing salutation)
R Rua (Portuguese: street; postal usage)
R Reinforcing
R Radial (ply tire)
R Referee
R Resistor
R Rebound (basketball)
R Rook (Chess)
R Search Radius (US DoD)
R Arginine (amino acid)
R Roughness
R Recibo (Portugese)
R Radar Contact (aviation)
R Gas Constant (physical constant)
R Hydrocarbon (functional group)
R Rimmed
R Reception Year (UK schools)
R Rupees
R Repeatability
R Rhizopus (fungi)
R Reflectance
R Roentgen (unit of radiation exposure)
R Aeronca Aircraft Corporation (manufacturer’s symbol; US Navy)
R Rankine (Degree)
R Rifampicin
R Respirations
R Rehydratable (food)
R Radiancy
R Research Octane
R Ramp Time (wireless communication)
R Read/er
R Brunswick-Balke-Callender (aircraft company; manufacturer’s symbol)
R Resuspension Factor
R Radial Antenna
R Confidential – Restricted Data (TMINS)
R US Revenue Stamp (Scott Catalogue prefix; philately)
R Corrected search radius (‘R nought’; R rounded up)
R Route Tuned NAVAID (aviation)
R Réaumier (temperature scale named after the French scientist Rene Antoine Ferchault de Reaumur)
R US DoT tire speed rating (106 mph)
R Third Heartbeat Wave

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