| FET | field-effect transistor; forced expiratory time |
|---|---|
| FETs | forced expiratory time in seconds |
| FEV | familial exudative vitreoretinopathy; forced expiratory volume |
| FEV1, | FEV1 forced expiratory volume in one second |
| FI | fasciculus intrafascicularis; fever caused by infection; fibrinogen; fixed interval; flame ionizatio... |