fifth ventricle

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a small cavity or chamber, as in the brain or heart.
ventricle of Arantius
1. the rhomboid fossa, especially its lower end.
fourth ventricle a median cavity in the hindbrain, containing cerebrospinal fluid.
ventricle of larynx the space between the true and false vocal cords.
lateral ventricle the cavity in each cerebral hemisphere, derived from the cavity of the embryonic tube, containing cerebrospinal fluid.
left ventricle the lower chamber of the left side of the heart, which pumps oxygenated blood out through the aorta to all the tissues of the body.
Morgagni's ventricle ventricle of larynx.
pineal ventricle an extension of the third ventricle into the stalk of the pineal body.
right ventricle the lower chamber of the right side of the heart, which pumps venous blood through the pulmonary trunk and arteries to the capillaries of the lung.
third ventricle a narrow cleft below the corpus callosum, within the diencephalon between the two thalami.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

cav·i·ty of sep·tum pel·lu·ci·dum

a slitlike, fluid-filled space of variable width between the left and right transparent septa, which occurs in fewer than 10% of human brains and may communicate with the third ventricle.
Farlex Partner Medical Dictionary © Farlex 2012

fifth ventricle

An unofficial name for the space between the two laminae of the septum pellucidum inside the brain.
See also: ventricle
Medical Dictionary, © 2009 Farlex and Partners