\Fib"u*la\, n.; pl. {Fibul[AE]}. [L., clasp, buckle.] 1. A brooch, clasp, or buckle. Mere fibul[ae], without a robe to clasp. --Wordsworth. 2. (Anat.) The outer and usually the smaller of the two bones of the leg, or hind limb, below the knee. 3. (Surg.) A needle for sewing up wounds.