Can”trap\, Cantrip \Can”trip\, n. [Cf. Icel. gandar, ODan. & OSw. gan, witchcraft, and E. trap a snare, tramp.] A charm; an incantation; a shell; a trick; adroit mischief. [Written also cantraip.] [Scot.]


He touched one of the scallops which adorned the edge of the tabouret and spoke a cantrap, to evoke the miniature of Gilgad in a construct of his near surroundings.

Source: Tales of the Dying Earth by Jack Vance.