vena metatarsus vs vena

vena metatarsus and vena both are nouns.

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

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

vena metatarsus: dorsal and plantar branches of veins serving the metatarsal region of the foot
vena: a blood vessel that carries blood from the capillaries toward the heart

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

vena metatarsus (noun)	vena (noun)
dorsal and plantar branches of veins serving the metatarsal region of the foot	a blood vessel that carries blood from the capillaries toward the heart