In architecture, having groins; showing the curved lines resulting from the intersection of two semicylinders or arches. See cut under groin.

adjective. Built with groins.

verb. Simple past tense and past participle of groin.

"The room in which Queen Bimbane received me was a superb apartment, magnificently decorated with elaborately carved columns supporting a kind of groined roof, the walls being draped with splendid tapestry worked on silk in gold thread, and hung with several enormous mirrors of polished silver in massive gold frames -- brackets supporting clusters of lamps on either side of each."

groined ceiling  

coined  conjoined  enjoined  joined  purloined  

groin