fourth ventricle
n.
An irregular cavity that extends from the obex to a communication with the sylvian aqueduct and is enclosed between the cerebellum dorsally and the tegmentum of rhombencephalon ventrally.
Words nearby fourth ventricle
fourth heart sound,
fourth international,
fourth of july,
fourth position,
fourth republic,
fourth ventricle,
fourth wall,
fourth world,
fourth-class,
fourthly,
fouta djallon