Lewis & Short

cŏrōnŭla, ae, f. dim. [corona, II. D.].

  1. I. The ornament on a mitre, Vulg. Exod. 39, 26.
  2. II. The rim or border of the base of a laver, Vulg. 3, Reg. 7, 29.
  3. III. A little crown above the horse’s hoof, Veg. Art. Vet. 3, 55, 2.