mesenteric vein vs vena mesenterica

mesenteric vein and vena mesenterica both are nouns.

Word	Noun	Adjective	Verb	Adverb
mesenteric vein	Yes	No	No	No
vena mesenterica	Yes	No	No	No

As nouns, mesenteric vein and vena mesenterica are synonyms defined as:

mesenteric vein and vena mesenterica: a tributary of the portal vein passing from the intestine between the two layers of mesentery

mesenteric vein (noun)	vena mesenterica (noun)
a tributary of the portal vein passing from the intestine between the two layers of mesentery	a tributary of the portal vein passing from the intestine between the two layers of mesentery