[1] : The Collaborative International Dictionary of English v.0.48

ventricle \ven"tricle\, n. l. ventriculus the stomach, a
   ventricle, dim. of venter the belly: cf. f. ventricule. see
   ventral.
   1. anat. a cavity, or one of the cavities, of an organ, as
      of the larynx or the brain; specifically, the posterior
      chamber, or one of the two posterior chambers, of the
      heart, which receives the blood from the auricle and
      forces it out from the heart. see heart.
      1913 webster

   note: the principal ventricles of the brain are the fourth in
         the medulla, the third in the midbrain, the first and
         second, or lateral, ventricles in the cerebral
         hemispheres, all of which are connected with each
         other, and the fifth, or pseudocoele, situated
         between the hemispheres, in front of, or above, the
         fornix, and entirely disconnected with the other
         cavities. see brain, and coelia.
         1913 webster

   2. the stomach. obs.
      1913 webster

            whether i will or not, while i live, my heart beats,
            and my ventricle digests what is in it. --sir m.
                                                  hale.
      1913 webster

   3. fig.: any cavity, or hollow place, in which any function
      may be conceived of as operating.
      1913 webster

            these ideas are begot on the ventricle of memory.
                                                  --shak.
      1913 webster ventricose
see also:
ventral heart brain coelia 

[2] : WordNet (r) 2.0

ventricle
     n 1: one of four connected cavities in the brain; is continuous
          with the central canal of the spinal cord and contains
          cerebrospinal fluid
     2: a chamber of the heart that receives blood from an atrium
        and pumps it to the arteries syn: heart ventricle
see also:
heart ventricle 

Ventricle >> V Words
Ventricle, definition of term: Ventricle
ventricle_pag1.html

Right Ventricle >> R Words
Right Ventricle, definition of term: Right Ventricle
right+ventricle_pag1.html

Left Ventricle >> L Words
Left Ventricle, definition of term: Left Ventricle
left+ventricle_pag1.html