| q | quantity |
| q2h | every two hours |
| q4h | every four hours |
| QA | quality assurance |
| QAC | before every meal |
| QAM | every morning |
| QAS | quality-adjusted survival |
| QAS | quaternary ammonium salts |
| QB | blood flow |
| QB | quiet breathing |
| QC | quality controls |
| QC | quality checks |
| QD | every day |
| QEE | quadriceps extension exercise |
| QF | quadriceps femoris |
| QF | Quantity-Frequency |
| qH | every hour |
| qhs | every night |
| QID | four times a day |
| QIO | Quality Improvement Organization |
| QIP | Quality Improvement Program |
| QIP | Quality Improvement process |
| QIP | Quality Improvement Project |
| QIW | Quality Inspection Work |
| QIW | four times a week |
| QJ | quadriceps jerk |
| QL | quality of life |
| QL | query language |
| QLI | Quality of Life Index |
| QLS | Quality of Life Scale |
| QLS | quality of life score |
| QM | Quality Management |
| QM | Quality Manager |
| QM | every morning |
| QN | every night |
| QN | quere number |
| QNS | quanity not sufficient |
| QOD | every other day |
| QOh | every other hour |
| QOh | quantity on hand |
| QOL | quality of life |
| QOM | quality of motion |
| QOM | Quick Ontology Mapping |
| QON | every other night |
| QPM | every evening |
| QPM | Quantitative Project Management |
| QPM | Quality program manager |
| QR | Quick Response |
| QR | quiet room |
| QR | Quality Review |
| QR | Quick Reaction |
| QS | Quiet Sleep |
| QS | a sufficient quantity |
| QT | quart |
| QT | Qualification Test |
| QTC | QT corrected for heart rate |
| QTL | quantitative trait locus |
| QTY | quantity |
| QU | quarterly |
| QU | question |
| QUAD | quadriplegic |
| QUAD | quadrant |
| QUAD | quadriceps |
| QW | quiet wakefulness |
| QW | every week |
| QWB | quality of well-being |
| QWB | Quality of Well-Being Index |
| QWK | once a week |