- du Bois Reymond criterion
- du Bois Reymond lemma
- du Bois Reymond theorem
- Dubreil
- Dubreil-Jacotin
- Dubreuil
- Dubrovnik
- Dubrovnik Republic
- Dubyago crater
- Ducal Palace
- Du Cao
- Duccio di Buoninsenga
- Du Changming
- Duchesne
- Du Chong
- Du Chongwei
- Duchy of Warsaw
- duck
- Duck Bay
- duck-billed platypus
- duck egg
- duck-fish farming system
- duck hepatitis A virus，DHAV
- Duck Hunting
- duck husbandry in biological fermentation bed