Source : Webster's Revised Unabridged Dictionary (1913)

Vallecula \Val*lec"u*la\, n.; pl. {Vallecul[ae]}. [NL., dim. fr.
   L. vallis, valles, a valley.]
   1. (Anat.) A groove; a fossa; as, the vallecula, or fossa,
      which separates the hemispheres of the cerebellum.

   2. (Bot.) One of the grooves, or hollows, between the ribs of
      the fruit of umbelliferous plants.

Source : WordNet®

vallecula
     n : (anatomy) any furrow or channel on a bodily structure or
         part [syn: {groove}]
     [also: {valleculae} (pl)]