Costrel \Cos"trel\ (k?s"tr?l), n. [CF. W. costrel, OF. costrel, LL. costrellum, a liquid measure, costrellus a wine cup.] A bottle of leather, earthenware, or wood, having ears by which it was suspended at the side. [Archaic] A youth, that, following with a costrel, bore The means of goodly welcome, flesh and wine. --Tennyson.