| Acronym | Definition |
|---|
| RA➣Rental Agreement |
| RA➣Resident Assistant |
| RA➣Resident Advisor |
| RA➣Research Article |
| RA➣Registration Authority |
| RA➣Republic Act (Philippines) |
| RA➣Royal Academy |
| RA➣Return Authorization |
| RA➣Risk Assessment |
| RA➣Right Ascension (astronomy) |
| RA➣Risk Analysis |
| RA➣Red Alert |
| RA➣Rise Against (band) |
| RA➣Rheumatoid Arthritis |
| RA➣Remote Access |
| RA➣Rain (aviation meteorology) |
| RA➣Regional Association |
| RA➣Rapport |
| RA➣Research Associate |
| RA➣Ravenna (Emilia Romagna, Italy) |
| RA➣Radium |
| RA➣Return Address (register) |
| RA➣Rechtsanwalt (German: attorney) |
| RA➣Room Air |
| RA➣Regulatory Affairs |
| RA➣Random Access |
| RA➣Red Alert (computer game) |
| RA➣Regulatory Authority |
| RA➣Republic of Armenia |
| RA➣Royal Artillery |
| RA➣Reserve Affairs |
| RA➣Residents' Association |
| RA➣Ram-Air (General Motors) |
| RA➣Right Atrium (heart chamber) |
| RA➣Radon |
| RA➣Range Anxiety |
| RA➣Remedial Action |
| RA➣Realidad Aumentada (Spanish: Augmented Reality) |
| RA➣Reliability Analysis |
| RA➣Research Announcement |
| RA➣Requirements Analysis |
| RA➣Removal Action |
| RA➣Remote Agent |
| RA➣Reasonable Accommodation |
| RA➣Red Army (WWII Soviet army) |
| RA➣Red Army (counterstrike gaming clan) |
| RA➣Return Air (HVAC) |
| RA➣Ray Allen (basketball player) |
| RA➣Registered Architect |
| RA➣Rural Area (terrain type) |
| RA➣Revenue Authority (various locations) |
| RA➣Resource Allocation |
| RA➣Reconnaissance Aircraft |
| RA➣Regional Administrator |
| RA➣Radio Australia |
| RA➣República Argentina |
| RA➣Remittance Advice |
| RA➣Range Area |
| RA➣Record Attempt |
| RA➣Royal Ambassadors |
| RA➣Representative Assembly (various organizations) |
| RA➣Router Advertisement (Message) |
| RA➣Regular Army |
| RA➣Rainforest Alliance |
| RA➣Remington Arms (ammunition headstamp) |
| RA➣Rankine |
| RA➣Ready Access |
| RA➣Royal Arch (Masons) |
| RA➣Rear Admiral |
| RA➣Realtor Associate |
| RA➣Radial Artery |
| RA➣Roman Army |
| RA➣Running Account (billing; various companies) |
| RA➣Radio Access |
| RA➣Rapid Access |
| RA➣Refractory Anemia (blood disorder) |
| RA➣Read Ahead |
| RA➣Remote Assistance |
| RA➣Regional Anesthesia |
| RA➣Ruthless Aggression |
| RA➣Right Aft |
| RA➣Restricted Areas |
| RA➣Reasonable Alternative |
| RA➣Roald Amundsen (1st explorer to reach the South Pole) |
| RA➣Royal Nepal Airlines (IATA airline code) |
| RA➣Rebel Alliance (Star Wars) |
| RA➣Irish Republican Army |
| RA➣Repair Authorization |
| RA➣Rehabilitation Act of 1973 |
| RA➣Random Allocation |
| RA➣Ramblers Association (UK) |
| RA➣Réalité Augmentée (French: Augmented Reality) |
| RA➣Recursion Available (computing) |
| RA➣Radiocommunications Agency (within DTI) |
| RA➣Recruiting Associate (various organizations) |
| RA➣Requiring Activity (US DoD) |
| RA➣Radar Altimeter |
| RA➣Resolution Advisory (air traffic warning) |
| RA➣Robust Nucleus of the Archistriatum |
| RA➣Rabbinical Assembly |
| RA➣Resident Agent |
| RA➣Rocket Arena (gaming site) |
| RA➣Radiological Assessment |
| RA➣Regulatory Analysis (environment) |
| RA➣Rate of Appearance |
| RA➣Relationship Anarchy |
| RA➣Responsible Authorities |
| RA➣Roughness Average (Surface texture of materials) |
| RA➣Revenue Account (UK) |
| RA➣Radio Altimeter |
| RA➣Rate-Adaptive |
| RA➣Readiness Assessment (various organizations) |
| RA➣RealAudio File (proprietary streaming audio compression format, Real Networks) |
| RA➣Rate Adaptation |
| RA➣Rationalist Association (UK) |
| RA➣Registration Agent (SIF) |
| RA➣Realm Ability (Dark Age of Camelot on-line game) |
| RA➣Red Armor (gaming) |
| RA➣Relational Aggression (psychology) |
| RA➣Rear Area |
| RA➣Radio Authority (UK) |
| RA➣Reimbursable Agreement |
| RA➣revenue analysis |
| RA➣Regia Aeronautica (Italian Royal Air Force) |
| RA➣Radiographic Absorptiometry (bone density calculation using a hand X-ray and a small metal wedge) |
| RA➣Recovery Assistance (Program; Ohio) |
| RA➣Routing Arbiter |
| RA➣Relay Access |
| RA➣Radiocommunication Assembly |
| RA➣Règlement d'Application (French: Rules Compliance; various organizations) |
| RA➣Reduction in Area |
| RA➣Rate Area (NANPA) |
| RA➣Resource Advisor |
| RA➣Roaming Agreement |
| RA➣Rubberized Asphalt |
| RA➣Resource Analyst |
| RA➣Regular Appointment |
| RA➣Registered Aromatherapist (professional certification) |
| RA➣Remote Adapter |
| RA➣Remembrance Agent (computer program) |
| RA➣Radiallahu Anhu (companions of Prophet Mohammed) |
| RA➣Requested Article (Wikimedia Foundation) |
| RA➣Red Armour (Quake) |
| RA➣Recoveries Anonymous (Twelve Step Fellowship) |
| RA➣Rescue Aid (emergency communications) |
| RA➣Resident Auditor |
| RA➣Ration Allowance |
| RA➣Ready Alert |
| RA➣Regional Associate |
| RA➣Requesting Activity (CEFMS) |
| RA➣Reduction Area |
| RA➣Reattack |
| RA➣Recorded Achievement ( Australian academics) |
| RA➣Restricted Article |
| RA➣Resident Administrator |
| RA➣Regulatory Alternative |
| RA➣Radiocommunication Act |
| RA➣Robot Aircraft |
| RA➣Runs Allowed per 9 Innings (baseball; like ERA, but with unearned runs also) |
| RA➣Run Aggressive (Front Page Sports Football '95 et al) |
| RA➣Reimbursement Authorization |
| RA➣Retribution Aura (gaming, World of Warcraft) |
| RA➣Ripple Adder |
| RA➣Postal Tax Stamp (Scott Catalogue prefix; philately) |
| RA➣Red Armageddon (gaming clan) |
| RA➣Repeat and Accumulate (type codes) |
| RA➣Ready Analog |
| RA➣Restricted Artistic (movie rating) |
| RA➣Reinforced Alert |
| RA➣Responsable d'Activités (French: Head of Activities) |
| RA➣Règle Administrative (French: Administrative Rule; various organizations) |
| RA➣Roundhead Association (historical reenactment group) |
| RA➣Router Arbiter |
| RA➣reduced ameloblasts |
| RA➣Raufoss Ammunition (Norwegian ammunition headstamp) |
| RA➣Record Auditing |
| RA➣Research Assistant/ship |
| RA➣Radiology Assembly of Medical Group Management Association |
| RA➣Rupture Adhésive (French: Adhesive Break; construction) |
| RA➣Resident Archive |
| RA➣Recruit Alliance |
| RA➣Earned Run Average Plus (arcane baseball statistic; used to measure pitching dominance versus the league) |
| RA➣Registraramerica (domain name registrar) |
| RA➣Review/Requiring Activity |
| RA➣Resynchronize Acknowledgement (ITU-T) |
| RA➣Route Analysis CSCI |
| RA➣Résiliable Annuellement (French: Annually Terminable; insurance) |
| RA➣Routing Area Identifier Within Routing Domain (TMN) |
| RA➣Religious of the Assumption (France) (religious order) |
Ra - an intensely radioactive metallic element that occurs in minute amounts in uranium ores