DHA, Dha and dha may refer to:
Chemicals
- 3,4-Dihydroxyamphetamine, an amphetamine derivative
- Docosahexaenoic acid, a 22:6 omega-3 fatty acid
- Dehydroandrosterone, an endogenous androgenic steroid
- Dehydroascorbic acid, an oxidized form of ascorbic acid
- Dehydroacetic acid, a pyrone derivative used as a plasticiser, as a fungicide, as a bactericide, and as a food preservative
- Dihydroxyacetone, the active ingredient in sunless or self-tanning skincare products
- 9,10-Dihydroanthracene, a form of anthracene whose center-ring carbons have been reduced
- Dihydroartemisinin, an antimalarial
- Dihydroalprenolol, a beta-adrenergic blocker
- Dehydroalanine, an uncommon unsaturated α-amino acid
Organizations
- Defence Housing Australia, a provider of family housing for members of the Australian Defence Forces
- Defence Housing Authority, provides commercial and residential housing developments for the Pakistani army
- Defense Health Agency, the United States Department of Defense agency responsible for managing the activities of the Military Health System
- Department of Humanitarian Affairs, now known as the United Nations Office for the Coordination of Humanitarian Affairs
- DHA Cinema, a movie theatre in Lahore, Pakistan
- District health authority, a former type of administrative organisation of the NHS in England and Wales
- Drug Houses of Australia, a Singapore pharmaceuticals manufacturer
- Demirören Haber Ajansı (Demirören News Agency), a Turkish news agency
Linguistics
- Dha (Indic), a glyph in the Brahmic family of script
- Dha (Javanese) (ꦝ), a letter in the Javanese script
Other
- Dha, Ladakh, a village in the Leh district of India.
- Dhahran International Airport, military airbase in Dhahran, Saudi Arabia
- Dha (sword), a single-edged weapon found in Burma/Myanmar, Thailand and other parts of Southeast Asia
- Directory Harvest Attack, a method used by spammers to obtain email addresses
- Disarmament as Humanitarian Action, a research project carried out at the United Nations Institute for Disarmament Research
- Doctor of Health Administration, a doctoral degree
- D.Ha., an abbreviation used for the United States District Court for the District of Hawaii
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