Medical Definition of ventricle
: a cavity of a bodily part or organ: asa: a chamber of the heart which receives blood from a corresponding atrium and from which blood is forced into the arteriesb: one of the system of communicating cavities in the brain that are continuous with the central canal of the spinal cord, that like it are derived from the medullary canal of the embryo, that are lined with an epithelial ependyma, and that contain a serous fluid—see lateral ventricle, third ventricle, fourth ventriclec: a fossa or pouch on each side of the larynx between the false vocal cords above and the true vocal cords below
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