The Collaborative International Dictionary of English v.0.48:

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