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 pseudoc[oe]le, situated
between the hemispheres, in front of, or above, the
fornix, and entirely disconnected with the other
cavities. See {Brain}, and {C[oe]lia}.
Whether I will or not, while I live, my heart beats,
and my ventricle digests what is in it. --Sir M.
Hale.
3. Fig.: Any cavity, or hollow place, in which any function
may be conceived of as operating.
These [ideas] are begot on the ventricle of memory.
--Shak.