| FR | failure rate; film-screen radiograph; fasciculus retroflexus; febrile reaction; feedback regulation;... |
|---|---|
| RE | radium emanation; readmission; rectal examination; reference emitter; reflux esophagitis; regional e... |
| UGF | Urinary Gonadotropin Fragment |
| B3F | band 3 cytoplasmic fragment |
| EFC | elastin fragment concentration; endogenous fecal calcium; ephemeral fever of cattle |