English
heterosystem
From hetero- + system.
Proto-Indo-European *sem- ‘one, whole’
Proto-Indo-European *sḿ̥teros
Proto-Hellenic *hə́teros
Ancient Greek ἕτερος ‘other, another, different’
English hetero-
Proto-Indo-European *steh₂- ‘to stand (up)’
…
Ancient Greek συνίστημι ‘to combine, organize’
Ancient Greek σύστημα ‘musical scale; organized body; whole made of…’
Late Latin systēma ‘harmony; musical scale; system’
Middle French systeme
English system
Today it means
noun A heterogeneous system
Language periods are conventional ranges, not dates for this word.
Etymograph / heterosystem