PKD may stand for: Philip K. Dick (1928–1982), American science fiction writer ICAO PKD, the International Civil Aviation Organization Public Key Directory Paroxysmal kinesigenic dyskinesia, a movement disorder Pi Kappa Delta, a forensics honor society Polycystic kidney disease PKD1 and PKD2, human genes Proliferative kidney disease, caused by the parasite Tetracapsuloides Proto-Kra–Dai language