sort by Rank | Alpha
| Possible Meanings | Rank |
| Oxygen Atom Transfer | **** |
| Overseas Adventure Travel | **** |
| Ontario Association of Triathletes | **** |
| Optometry Admissions Test | **** |
| Organic Acid Technology | *** |
| Office of Accountability and Transparency | *** |
| Oral Anticoagulant Therapy | *** |
| OpenLink AJAX Toolkit | *** |
| Ozark Actors Theatre | *** |
| Outcomes Assessment Team | *** |
| Open Air Theatre | *** |
| Optometry Admission Testing | *** |
| Open Air Theater | *** |
| ornithine-delta-aminotransferase | *** |
| Organic Anion Transporter | *** |
| Own Account Transfer | *** |
| Original Article Text | *** |
| Oral Anticoagulation Therapy | *** |
| Office Administration Technology | *** |
| Organic Acid Test | *** |
| Obtain an Accurate | *** |
| Orkney Archaeological Trust | *** |
| Observatory of Trieste | *** |
| Optimization Algorithm Toolkit | *** |
| Office Administration and Technology | *** |
| Organic Anion Transporters | *** |
| Organizational Assessment Tool | *** |
| Organic Anion Transporting | *** |
| Outside Air Temperatures | *** |
| Organize Autonomize Triumph | *** |
| Oracle Auditing Tools | *** |
| Outside Ambient Temperature | ** |
| Object Alternation Test | ** |
| Object Assembly Test | ** |
| odontogenic adenomatoid tumor | ** |
| oligopyrimidine/AUG tandem | ** |
| oral anticoagulant treatment | ** |
| oral anticoagulation treatment | ** |
| ornithine amino transferase | ** |
| osteochondral autograft transplantation | ** |
| Office for the Advancement for Telehealth | ** |
| 2-oxoacid aminotransferase | ** |
| L-ornithine:2-oxoacid aminotransferase | ** |
| oligo-astheno-teratozoospenny | ** |
| Oligo Astheno Teratozoospermia | ** |
| Out of Area Treatment | ** |
| Out of Area Treatments | ** |
| objective Allen's test | ** |
| ornithine-oxo-acid aminotransferase | ** |
| Optometry Admission Tests | ** |
| Open Artery Trial | ** |
| Office of Academic Technology | ** |
| Office Administrative Training | ** |
| Office of Aeronautics | ** |
| Operational Acceptance Testing | ** |
| Order of Architects of Tunisia | ** |
| Osservatorio Astronomico Trieste | ** |
| Obscene Articles Tribunal | ** |
| Office of Advanced Technology | ** |
| Office of Advancement of Telehealth | ** |
| Obstacle Avoiding Tree | ** |
| Oldest Active Transaction | ** |
| Open Air Testing | ** |
| Outdoor Adventure Training | ** |
| OCTAVE Automated Tool | ** |
| Opioid Agonist Therapy | * |
| Organizing for Autonomous Telecomms | * |
| Out of Area Transfer | * |
| Operation Algorithm Team | * |
| Optically Amplified Transmitters | * |
| Optional Auxiliary Terminal | * |
| Orbit Adjust Thrusters | * |
| Overly Ambitious Trio | * |
| Oligo Astheno Teratospermia | * |
| Original Architecture Translator | * |
| Officer Assignment Team | * |
| Officer Assignment Teams | * |
| Ontario Agricultural Training | * |
| Office for Aboriginal and Torres | * |
| Osservatorio Astronomico di Trie | * |
| Overburden And Topsoil | * |
| Operational Altitude Temperature | * |
| Our Action Team | * |
| Obligations Assumilables de TrTsor | * |
| Observing Array in the Tropical | * |
| Osservatorio Astronomico di Tori | * |