| FIFR | fasting intestinal flow rate |
|---|---|
| fl | femtoliter; filtered load; flexion, flexible; fluorescent; flow; fluid; flutter; foot lambert |
| FLS | fatty liver syndrome; Fellow of the Linnean Society; fibrous long-spacing [collagen]; flow-limiting ... |
| FR | failure rate; film-screen radiograph; fasciculus retroflexus; febrile reaction; feedback regulation;... |
| FRE | Fischer rat embryo; flow-related enhancement |