| TF | free thyroxine; tactile fremitus; tail flick [reflex]; temperature factor; testicular feminization; ... |
|---|---|
| FAR | Federal acquisitions regulation; fractional albumin rate; fresh bone marrow |
| FR | failure rate; film-screen radiograph; fasciculus retroflexus; febrile reaction; feedback regulation;... |
| IRIS | integrated risk information system; interleukin regulation of immune system; International Research ... |
| DF | decapacitation factor; decontamination factor; deferoxamine; deficiency factor; defined flora [anima... |