crustŭlum, i, n. dim. [crustum],
small pastry, confectionery , Varr. L. L. 5, § 107 Müll.; Hor. S. 1, 1, 25; 2, 4, 47; Juv. 9, 5; Sen. Ep. 99, 27; Inscr. Grut. 100, 5 al.
crūstulum ī, n dim.crustum, small pastry, confectionery : pueris dare crustula, H., Iu. ...
An Elementary Latin Dictionary