DQD

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