| FR | failure rate; film-screen radiograph; fasciculus retroflexus; febrile reaction; feedback regulation;... |
|---|---|
| FAR | Federal acquisitions regulation; fractional albumin rate; fresh bone marrow |
| IRIS | integrated risk information system; interleukin regulation of immune system; International Research ... |
| BFB | biological feedback; bronchial foreign body |
| DAF | decay-accelerating factor; delayed auditory feedback; drug-adulterated food |