Lewis & Short

sĭmĭla, ae, f. [root si, to sift; cf. Gr. ἱμαλιά; Germ. Semmel], the finest wheat flour, Cels. 2, 18 med.; 2, 30; Mart. 13, 10 in lemm.; Hier. Ep. 52, 6; 54, 11.
Called also, sĭmĭlāgo, Plin. 18, 10, 20, § 89; Ambros. in Luc. 8, § 49; Vulg. Num. 7, 13 et saep.