无孔纲：囊孢子门(Asc-etospora)寄生性原生动物的一个纲。此类原生动物有双细胞孢子；每个孢子质，一个连续的孢子壁，没有极管，该属有一个目，即无孔目- Formin
- formocortal
- formol
- form-order
- formula
- formulary
- formulate
- formulation
- formyl
- formylase
- formylkynurenine hydrolase
- formyltetrahydrofolate
- formyltetrahydrofolate dehydrogenase
- formyltransferase
- fornicate
- fornix
- Foroblique
- Forssell's sinus
- Forssmann
- Forssmann's antigen
- Forthane
- Fortraz
- fortuitous
- fosfomycin
- fosfonet sodium