fibula \fib"u*la\ (f[i^]b"[-u]*l[.a]), n.; pl. {fibul[ae]}. [L., clasp, buckle.] 1. A brooch, clasp, or buckle. [1913 Webster] Mere fibul[ae], without a robe to clasp. --Wordsworth. [1913 Webster] 2. (Anat.) The outer and usually the smaller of the two bones of the leg, or hind limb, below the knee. [1913 Webster] 3. (Surg.) A needle for sewing up wounds. [1913 Webster]