Lewis & Short

flammŭla, ae, f. dim. [flamma + vomo], a little flame.

  1. I. Lit.: Timagoras negat sibi umquam, cum oculum torsisset, duas ex lucerna flammulas esse visas, Cic. Ac. 2, 25, 80; Col. 9, 14, 9.
  2. II. Transf., in late Lat., a little banner used by cavalry, Veg. Mil. 2, 1; 3, 5.