English
heterotropic
From hetero- + tropic.
Proto-Indo-European *sem- ‘one, whole’
Proto-Indo-European *sḿ̥teros
Proto-Hellenic *hə́teros
Ancient Greek ἕτερος ‘other, another, different’
English hetero-
Proto-Indo-European *trep- ‘to turn’
Ancient Greek τρέπω ‘turn’
Ancient Greek τροπή ‘turn; solstice’
Ancient Greek τροπικός ‘of a turn; of the solstice’
Late Latin tropicus ‘of or pertaining to the solstice’
English tropic
Today it means
adj Concerning an effect in one entity that is controlled or influenced by a separate entity, such as when one ligand influences the binding of another ligand.
Language periods are conventional ranges, not dates for this word.
Etymograph / heterotropic