Source : Webster's Revised Unabridged Dictionary (1913)

Utricle \U"tri*cle\, n. [L. utriculus a little womb, a calycle,
   dim. of uter, utris, a bag or bottle made of an animal's
   hide: cf. F. utricule.]
   1. A little sac or vesicle, as the air cell of fucus, or
      seaweed.

   2. (Physiol.) A microscopic cell in the structure of an egg,
      animal, or plant.

   3. (Bot.) A small, thin-walled, one-seeded fruit, as of
      goosefoot. --Gray.

   4. (Anat.) A utriculus.

Source : WordNet®

utricle
     n : a small pouch into which the semicircular canals open [syn:
         {utriculus}]