Where does “gastrotropin” come from?

gastrotropin (English) comes from English -trope, from Latin tropus, from Ancient Greek τρόπος, from Ancient Greek τροπή, from Ancient Greek -ή, from Ancient Greek -ᾱ, from Proto-Indo-European -éh₂.

gastrotropin (English): A cytoplasmic, hydrophobic ligand-binding protein which stimulates gastric acid and pepsinogen secretion

Definitions

A cytoplasmic, hydrophobic ligand-binding protein which stimulates gastric acid and pepsinogen secretion

Ancestry of “gastrotropin”, step by step

Step	Language	Word	Meaning
1	English	-trope	something that turns, affects, changes, responds,...
2	Latin	tropus	a figurative use of a word, a trope; a way of...
3	Ancient Greek	τρόπος	a turn, way, manner, style; a trope or figure of...
4	Ancient Greek	τροπή	a turning; turning away the enemy, a rout;...
5	Ancient Greek	-ή	suffix of feminine nouns in the [[Appendix:Ancient Greek first declension
6	Ancient Greek	-ᾱ	nominal suffix
7	Proto-Indo-European	-éh₂	—

Every word from Proto-Indo-European -éh₂ →Every word from Ancient Greek -ή →Every word from Ancient Greek τροπή →