Abbreviations starting with R (page 1 of 2)

348 abbreviations begin with R. This page lists R to RTA.

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0–9

R – Republican (party label) +13 more
R&A – The R&A
R&B – Rhythm and blues
R&D – Research and development
R&R – Rest and recuperation +2 more
R&W – Representations and warranties
R-CHOP – Rituximab, cyclophosphamide, hydroxydaunorubicin…
R/O – Rule out
R01 – Research Project Grant (NIH R01)
R1 – Doctoral universities with very high research spending and…
R² – Coefficient of determination +1 more
RA – Rheumatoid arthritis +10 more
RaaS – Ransomware as a service
RAC – Recovery Audit Contractor +1 more
RACE – Rescue, alarm, contain, extinguish
RACES – Radio Amateur Civil Emergency Service
RACI – Responsible, accountable, consulted, informed
rad – Radian +4 more
Rad Onc – Radiation oncology
radar – Radio detection and ranging
RADIUS – Remote Authentication Dial-In User Service
RADM – Rear Admiral (upper half)
Rads – Radiology
RADT – Rapid antigen detection test
RAF – Royal Air Force +1 more
RAG – Retrieval-augmented generation +1 more
RAI – Radioactive iodine +1 more
RAID – Redundant array of independent disks +1 more
RAII – Resource acquisition is initialization
RAINN – Rape, Abuse & Incest National Network
RAIU – Radioactive iodine uptake
RAL – Raltegravir
RALP – Robot-assisted laparoscopic prostatectomy
RAM – Random-access memory
RAN – Radio access network
RAND – RAND Corporation
RAPD – Relative afferent pupillary defect
RAR – Roshal Archive
RAROC – Risk-adjusted return on capital
RAS – Renal artery stenosis
RASS – Richmond Agitation-Sedation Scale
RAT – Remote access trojan
RATP – Régie autonome des transports parisiens (Autonomous…
RAW – Research and Analysis Wing +1 more
RB – Running back +2 more
RBA – Reserve Bank of Australia
RBAC – Role-based access control
RBBB – Right bundle branch block
RBC – Red blood cell count +1 more
RBD – REM sleep behavior disorder
RBG – Ruth Bader Ginsburg
RBI – Run batted in +1 more
RBS – Royal Bank of Scotland
RC – Release candidate +3 more
RCA – Root cause analysis +3 more
RCC – Renal cell carcinoma +1 more
RCD – Residual-current device
RCE – Remote code execution +1 more
RCEP – Regional Comprehensive Economic Partnership
RCF – Revolving credit facility
RCIA – Rite of Christian Initiation of Adults
RCM – Restrictive cardiomyopathy
RCMP – Royal Canadian Mounted Police
RCN – Royal College of Nursing
RCP – Representative Concentration Pathway
RCR – Rotator cuff repair +1 more
RCRA – Resource Conservation and Recovery Act
RCRI – Revised Cardiac Risk Index
RCS – Rich Communication Services
RCT – Randomized controlled trial +1 more
RCTA – Rear cross-traffic alert
RCV – Ranked-choice voting +1 more
RCVS – Reversible cerebral vasoconstriction syndrome
RD – Road +7 more
RDAP – Residential Drug Abuse Program
RDBMS – Relational database management system
RDC – Remote deposit capture
RDF – Resource Description Framework
Rdg – Ridge
RDI – Respiratory disturbance index
RDL – Romanian deadlift
RDML – Rear Admiral (lower half)
RDN – Registered dietitian nutritionist
rDNS – Reverse DNS
RDP – Remote Desktop Protocol
RDS – Respiratory distress syndrome +1 more
RDSP – Registered Disability Savings Plan
RDU – Raleigh-Durham International Airport
RDW – Red cell distribution width
RE – In re (in the matter of, regarding) +6 more
REA – Rural Electrification Administration +1 more
REAL ID – REAL ID-compliant identification
REB – Rebounds
REC – Renewable energy certificate +1 more
rec'd – Received
RECIST – Response Evaluation Criteria in Solid Tumors
REDD+ – Reducing emissions from deforestation and forest degradation
REER – Real effective exchange rate
Ref. – Reference +1 more
refl. – Reflexive
ReFS – Resilient File System
Reg. – Regular (price)
regex – Regular expression
Regt – Regiment
reh'g – Rehearing
REI – Recreational Equipment, Inc. +1 more
REIT – Real estate investment trust
Rekt – Wrecked
rel. – Relative
ReLU – Rectified linear unit
rem – Roentgen equivalent man
REMF – Rear-echelon mother******
REMS – Risk Evaluation and Mitigation Strategy
REO – Real estate owned
Rep. – Representative
REPL – Read-eval-print loop
repr. – Reprint or reprinted
req – Requisition +1 more
RER – Réseau express régional (Regional Express Network)
Res. – Reservation +2 more
res ipsa – Res ipsa loquitur (the thing speaks for itself)
resp. – Respectively +1 more
RESPA – Real Estate Settlement Procedures Act
Resp't – Respondent
REST – Representational state transfer
ret. – Retired
Retic – Reticulocyte count
Rev. – Reverend +3 more
Rev. Proc. – Revenue Procedure
Rev. Rul. – Revenue Ruling
rev'd – Reversed +1 more
Rez – Resurrect
RF – Rheumatoid factor +6 more
RFA – Request for admission +2 more
RFC – Request for Comments
RFD – Rural Free Delivery
RFI – Request for information +1 more
RFID – Radio-frequency identification
RFK – Robert F. Kennedy
RFLP – Restriction fragment length polymorphism
RFM – Recency, frequency, monetary value
Rfn – Rifleman
RFP – Request for proposal +2 more
RFQ – Request for quotation
RFT – Request for tender +1 more
rFVIIa – Recombinant activated factor VII
Rg – Roentgenium
RGA – Republican Governors Association
RGB – Red, green, blue
Rgds – Regards
RGV – Rio Grande Valley
Rh – Rhesus (D antigen) +1 more
RHC – Right heart catheterization +1 more
RHCE – Red Hat Certified Engineer
RHCSA – Red Hat Certified System Administrator
RHD – Rheumatic heart disease
RHEL – Red Hat Enterprise Linux
Rheum – Rheumatology
RHIA – Registered Health Information Administrator
RHIB – Rigid-hulled inflatable boat
RHIC – Relativistic Heavy Ion Collider
RhIG – Rho(D) immune globulin
RHIT – Registered Health Information Technician
RHP – Right-handed pitcher
RHR – Resting heart rate
RHS – Right-hand side
RI – Rhode Island +2 more
RIA – Registered investment adviser
RIAA – Recording Industry Association of America
RICE – Rest, ice, compression and elevation +1 more
Richd. – Richard
RICO – Racketeer Influenced and Corrupt Organizations Act
RIF – Reduction in force +1 more
RIG – Rabies immune globulin
RINO – Republican in name only
R.I.P. – Requiescat in pace (may he or she rest in peace) +2 more
RIPE – Rifampin, isoniazid, pyrazinamide and ethambutol
RIR – Reps in reserve +1 more
RISC – Reduced instruction set computer
RISC-V – RISC-V (open instruction set architecture)
RISD – Rhode Island School of Design
RISP – Runners in scoring position
RIT – Rochester Institute of Technology +2 more
Riv – River
Rizz – Charisma
RJ11 – Registered Jack 11
RL – Reinforcement learning
RLAIF – Reinforcement learning from AI feedback
RLD – Reference listed drug
RLE – Right lower extremity
RLHF – Reinforcement learning from human feedback
RLL – Right lower lobe
RLQ – Right lower quadrant
RLS – Restless legs syndrome
RLT – Revocable living trust
RLWL – Remote location waiting list
RLY – Really
RM – Royal Marines +5 more
RMA – Return merchandise authorization +1 more
RMB – Renminbi
RMD – Required minimum distribution
RMI – Republic of the Marshall Islands
RML – Right middle lobe
RMS – Root mean square +2 more
RMSE – Root mean square error
RMSF – Rocky Mountain spotted fever
RMT – National Union of Rail, Maritime and Transport Workers +1 more
RMV – Registry of Motor Vehicles
RN – Registered nurse +4 more
RNA – Ribonucleic acid
RNA-seq – RNA sequencing
RNAi – RNA interference
RNAV – Area navigation
RNC – Republican National Committee +1 more
RNC-NIC – Registered Nurse Certified in Neonatal Intensive Care…
RNC-OB – Registered Nurse Certified in Inpatient Obstetric Nursing
Rnch – Ranch
RNG – Random number generator +1 more
RNLI – Royal National Lifeboat Institution
RNN – Recurrent neural network
RNO – Reno-Tahoe International Airport
RNP – Required navigation performance
RO – Romania +1 more
Ro-Ro – Roll-on/roll-off
ROA – Return on assets
ROAS – Return on ad spend
Robt. – Robert
ROC – Receiver operating characteristic +3 more
ROCE – Return on capital employed
ROE – Rules of engagement +1 more
ROFL – Rolling on the floor laughing
ROFLMAO – Rolling on the floor laughing my a** off
ROFO – Right of first offer
ROFR – Right of first refusal
ROG – Interrogatory
ROI – Return on investment +1 more
ROIC – Return on invested capital
ROK – Republic of Korea
ROM – Range of motion +6 more
ROMI – Return on marketing investment
RON – Romanian leu
ROP – Retinopathy of prematurity +2 more
ROPO – Research online, purchase offline
ROR – Released on own recognizance +1 more
ROS – Review of systems +2 more
ROSC – Return of spontaneous circulation
ROTC – Reserve Officers' Training Corps
Roth 401(k) – Roth designated account within a 401(k) plan
Roth IRA – Roth individual retirement account
ROU – Right-of-use asset
ROW – Regulation plus overtime wins
ROY – Rookie of the Year
RP – Role-play +8 more
RP-1 – Rocket Propellant-1
RPA – Robotic process automation
RPC – Remote procedure call +1 more
RPE – Rate of perceived exertion +1 more
RPF – Real person fiction
RPG – Ruchnoy protivotankovy granatomyot (hand-held anti-tank… +2 more
RPh – Registered pharmacist
RPI – Rensselaer Polytechnic Institute +1 more
RPM – Revolutions per minute +3 more
RPO – Run-pass option +2 more
RPR – Rapid plasma reagin
RPS – Renewable portfolio standard
RPV – Rilpivirine +1 more
RQ – Rage quit
RQMS – Regimental Quartermaster Sergeant
RR – Respiratory rate +4 more
RRC – Residential reentry center
RREF – Reduced row echelon form
RRIF – Registered Retirement Income Fund
RRMS – Relapsing-remitting multiple sclerosis
rRNA – Ribosomal RNA
RRP – Recommended retail price
RRR – Regular rate and rhythm +3 more
RRSP – Registered Retirement Savings Plan
RRT – Rapid response team +2 more
Rs – Rupee +2 more
RSA – Republic of South Africa +2 more
RSBI – Rapid shallow breathing index
RSCJ – Society of the Sacred Heart
RSF – Reporters Without Borders +1 more
RSI – Rapid sequence intubation +1 more
RSM – Regimental Sergeant Major +2 more
RSO – Registered student organization
RSP – Resource Specialist Program
RSPB – Royal Society for the Protection of Birds
RSPCA – Royal Society for the Prevention of Cruelty to Animals
RSS – Rashtriya Swayamsevak Sangh +2 more
RSSI – Received signal strength indicator
RSU – Restricted stock unit
RSV – Respiratory syncytial virus +1 more
RSVP – Répondez s'il vous plaît (please reply)
RSW – Southwest Florida International Airport
RT – Retweet +5 more
Rt. Hon. – Right Honourable
RT-PCR – Reverse transcription polymerase chain reaction
Rt. Rev. – Right Reverend
RTA – Renal tubular acidosis