† mescroyantObs.rare—1. [a. OF.mescroyant, var. of mescreiant, mescreant: see miscreant.] A misbeliever. 1711Hickes Two Treat.Chr. Priesth. (1847) II. 365 The Church and clergy..are every day..insulted by every vile mescroyant, and every blaspheming tongue.