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WordNet
great cerebral vein

n. a cerebral vein formed by the two internal cerebral veins and continuing into the sinus rectus [syn: vena cerebri magna]

Wikipedia
Great cerebral vein

The great cerebral vein is one of the large blood vessels in the skull draining the cerebrum (brain). It is also known as the "vein of Galen" (VG), named for its discoverer, the Greek physician Galen. However, it is not the only vein with this eponym.