无口目：寡膜纲(Oligohymenophorea)膜口亚纲(Hymenostomatia)中的内寄生性原虫目，常有一致的大或长纤毛，但无胞口及胞肛，虫体前端常有复杂的吸附器(钩、棘或吸器)，栖息于土壤、淡水及海洋中- Daubenton's angle,plane(line)
- daughter
- daunomycin
- daunorubicin
- daunosamine
- Dausset
- Davainea
- Davaineidae
- Davidoff's (Davidov's) cells
- David's disease
- Davidsohn differential absorption test
- Davidsohn's sign
- Daviel's operation,spoon
- Davis graft
- Dawbarn's sign
- dazadrol maleate
- DBA
- dB,db
- DBI
- D.C.
- D&C
- dC
- DCA
- gliococcus
- gliocyte