Where does “orthotropia” come from?

orthotropia (English) comes from English -tropia, from Ancient Greek τρόπος, from Ancient Greek τροπή, from Ancient Greek -ή, from Ancient Greek -ᾱ, from Proto-Indo-European -éh₂.

orthotropia (English): The normal absence of heterotropia

Definitions

The normal absence of heterotropia

Ancestry of “orthotropia”, step by step

Step	Language	Word	Meaning
1	English	-tropia	turning, movement; identical in origin to -tropy but more commonly associated with medicine, especially eye conditions
2	Ancient Greek	τρόπος	a turn, way, manner, style; a trope or figure of...
3	Ancient Greek	τροπή	a turning; turning away the enemy, a rout;...
4	Ancient Greek	-ή	suffix of feminine nouns in the [[Appendix:Ancient Greek first declension
5	Ancient Greek	-ᾱ	nominal suffix
6	Proto-Indo-European	-éh₂	—

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