Lewis & Short

sĭlīgo, ĭnis, f.

  1. I. A kind of very white wheat, winter-wheat: Triticum hibernum, Linn.; Cato, R. R. 35, 1?? Varr. R. R. 1, 23, 2; Cels. 2, 19; Col. 2, 6, 2; 2, 9, 5; 2, 9, 13; Plin. 18, 8, 20, § 85; 18, 7, 10, § 61.
  2. II. Transf., fine wheaten flour, Plin. 18, 9, 20, § 85; Juv. 5, 70; 6, 472.