| FA | fractional anisotropy |
|---|---|
| FA | fructosamine |
| FA-1 | Fetal Antigen 1 |
| FA-1 | fertilization antigen |
| FA-2 | Fetal Antigen 2 |
| FAA | 2-N-fluorenylacetamide |
| FAA | 4-formyl-amino-antipyrine |
| FAA | Federal Aviation Administration |
| FAA | Flavone 8-acetic acid |
| FAA | Food anticipatory activity |