| DIM | divalent ion metabolism; medium infective dose [Lat. dosis infectionis media] |
|---|---|
| FIM | field ion microscopy; functional independence measure |
| FU | fecal urobilinogen; fetal urobilinogen; fluorouracil; follow-up; flux unit [ion]; fractional urinaly... |
| H+ | hydrogen ion |
| [H+] | hydrogen ion concentration |