Where does “mesenterium” come from?

mesenterium (Latin) comes from Ancient Greek μεσεντέριον, from Ancient Greek ἔντερον, from Proto-Indo-European h₁énteros, from Proto-Indo-European -teros — Contrastive or oppositional adjectival suffix.

Ancestry of “mesenterium”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	μεσεντέριον	Membrane to which the intestines are attached,...
2	Ancient Greek	ἔντερον	guts, viscera intestine, gut, belly, bowel, womb;...
3	Proto-Indo-European	h₁énteros	inside, within
4	Proto-Indo-European	-teros	Contrastive or oppositional adjectival suffix

Every word from Proto-Indo-European -teros →