| OM | obtuse mental; occipitomental; occupational medicine; ocular movement; oculomotor; Osborne Mendel [r... |
|---|---|
| PETH | pink-eyed, tan-hooded [rat] |
| rANP | rat atrial natriuretic peptide |
| RAR | rapidly adapting receptor; rat insulin receptor; retinoic acid receptor; right arm reclining; right ... |
| RARLS | rabbit anti-rat lymphocyte serum |