| TAT | tetanus antitoxin; thematic apperception test; thematic aptitude test; thrombin-antithrombin complex... |
|---|---|
| ETO | estimated time of ovulation |
| OIH | Office of International Health; orthoiodohippurate; ovulation-inducing hormone |
| OM | obtuse mental; occipitomental; occupational medicine; ocular movement; oculomotor; Osborne Mendel [r... |
| OV | oculovestibular; office visit; osteoid volume; outflow volume; ovalbumin; ovary; overventilation; ov... |