vena cerebri vs vena

vena cerebri and vena both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena cerebri	Yes	No	No	No
vena	Yes	No	No	No

As nouns, vena is a hypernym of vena cerebri; that is, vena is a word with a broader meaning than vena cerebri:

vena cerebri: any of several veins serving the cerebral hemispheres of the brain
vena: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of vena cerebri include vein, venous blood vessel.

vena cerebri (noun)	vena (noun)
any of several veins serving the cerebral hemispheres of the brain	a blood vessel that carries blood from the capillaries toward the heart