| Fc | centroid frequency; fraction/centrifuge; fragment, crystallizable [of immunoglobulin] |
|---|---|
| Fc' | a fragment of an immunoglobulin molecule produced by papain digestion |
| FW | Felix-Weil [reaction]; Folin-Wu [reaction]; fragment wound |
| HTF | heterothyrotropic factor; house tube feeding; HpaII tiny fragment |
| MFW | multiple fragment wounds |