The Collaborative International Dictionary of English v.0.48:

Stiletto \Sti*let"to\, n.; pl. Stilettos. [It., dim. of stilo
   a dagger, fr. L. stilus a pointed instrument. See Style for
   writing, and cf. Stylet.]
   1. A kind of dagger with a slender, rounded, and pointed
      blade.
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   2. A pointed instrument for making eyelet holes in
      embroidery.
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   3. A beard trimmed into a pointed form. [Obs.]
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            The very quack of fashions, the very he that
            Wears a stiletto on his chin.         --Ford.
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