DQD or dqd can refer to:
- Ornithorhynchidae, a family that contains the platypus and its extinct evolutionary relatives, by Catalogue of Life code
- Double Quantum Dot, a quantum technology invented by German physicist Andreas Wallraff
- WisdomTree U.S. Quality Dividend Growth Variably Hedged Index ETF™, a Canadian exchange-traded fund; see List of Canadian exchange-traded funds
- dqd, an operation on polyhedrons in Conway polyhedron notation
This disambiguation page lists articles associated with the title DQD.
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