| FIV1 | forced inspiratory volume in one second |
|---|---|
| FIVC | forced inspiratory vital capacity |
| FMF | familial Mediterranean fever; fetal movement felt; flow microfluorometry; forced midexpiratory flow |
| FO | fiberoptic; fish oil; foot arthrosis; foramen ovale; forced oscillation; fronto-occipital |
| FVC | false vocal cord; forced vital capacity |