| NSC | neurosecretory cell; no significant change; nonservice connected; nonspecific suppressor cell; norma... |
|---|---|
| OC | obstetrical conjugate; occlusocervical; office call; on call; only child; optic chiasma; oral contra... |
| OCD | obsessive compulsive disorder; Office of Child Development; Office of Civil Defense; osteochondritis... |
| PAC | papular acrodermatitis of childhood; parent-adult-child; pericarditis-arthropathy-camptodactyly [syn... |
| PBLC | peripheral blood lymphocyte count; premature birth living child; problem-based learning curriculum |