- demibranch
- demi closed mapping
- demi-closed mapping
- demi-continuity
- demi continuous mapping
- demi-continuous mapping
- demidegree
- demidegree inward
- demidegree outward
- demigroup
- demilitarized zone
- demilitarized zone, DMZ
- demineralization
- Deming application prize
- De Minimis
- demiregular tessellation
- demi-symmetry
- demixing
- DEMO
- Democracy
- democracy
- Democracy and Education
- Democracy and its Critics
- Democracy in America
- democralization of education