Frit

Chamber's Twientieth Century Dictionary · 1908 · p. 42

frit, n. the mixed materials of which gla is made, after being heated until they fuse partially without melting.— v.t. to fuse partially without melting:— pr.p. frit′ting ; pa.p. frit′ted. [Fr. fritte —It. fritt a .—L. frigĕre , frictum , to roast.]