parietal (adj.)youdaoicibaDictYouDict[parietal 词源字典]
early 15c., "pertaining to the walls of a cavity in the body," from Late Latin parietalis "of walls," from Latin paries (genitive parietis) "wall" (of a building), of unknown origin. In U.S. also "pertaining to the residents and rules of a college or university" (1837).[parietal etymology, parietal origin, 英语词源]