| 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 |
| FIF | feedback inhibition factor; fibroblast interferon; forced inspiratory flow; formaldehyde-induced flu... |