| FR | failure rate; film-screen radiograph; fasciculus retroflexus; febrile reaction; feedback regulation; Fischer-Race [notation]; fixed ratio; flocculation reaction; flow rate; fluid restriction; fluid resuscitation; fluid retention; free radical; frequency of respiration; frequent relapses |
|---|---|
| Fr | fracture; francium; franklin [unit charge]; French; frequency or frequent |
| Fr | BB fracture of both bones |
| Fr1 | first fraction |
| FRA | fibrinogen-related antigen; fluorescent rabies antibody |
| fra | fragil [site] |
| fra(X) | fragile X chromosome, fragile X syndrome |
| FRAC | Food Research and Action Center |
| frac | fracture |
| fract | fracture |