〔G.H.Fox；John Addison Fordyce，纽约皮肤病学家，1858～1925〕Fox-Fordyce病：见disease项下- 5-hydroxytryptamine
- 5-methyltetrahydrofolate-homocysteine meth-yltransferase
- 5-oxoprolinase (ATP hydrolyzing)
- 5-oxoproline
- 5-oxoprolinuria
- 5-ribosyluridine
- 606
- 6-aminopenicillanic acid
- 6-azauridine
- 6-mercaptopurine
- 6-MP
- 6-phytase
- 7,12-dimethylbenz anthracene
- 7-aminocephalosporanic acid
- 8-methoxypsoralen
- A.
- A
- a
- a.
- aa.
- A.A.
- AA
- A.A.A.
- A.A.A.S.
- A.A.B.B.