[fju:z]
①保险丝：为安全而置于电路内的一种易于熔化的金属杆、条或丝。当电流增至超过安全强度时即熔化以切断电路，避免超载；②熔合，融合：结合在一起，如邻近结构的异常结合- 4-hydroxyphenylpyruvate dioxygenase
- 5,10-methylenetetrahydrofolate reductase
- 5-aminolevulinate synthase
- 5-bromodeoxyuridine
- 5-bromouracil
- 5'-deoxyadenosyl transferase
- 5-formyltetrahydrofolate cycloligase
- 5-FU
- 5-HIAA
- 5-HT
- 5-hydroxyindoleacetic acid
- 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