English

heterometallic

From hetero- + metallic.

Proto-Indo-European *sem- ‘one, whole’

Proto-Indo-European *sḿ̥teros

Proto-Hellenic *hə́teros

Ancient Greek ἕτερος ‘other, another, different’

Ancient Greek μέταλλον ‘metal’

Latin metallum ‘metal’

Latin metallicus ‘yielding or abounding in metal’

Today it means

adj Describing any compound in which one or more atoms are replaced by those of a (different) metal

Language periods are conventional ranges, not dates for this word.

Etymograph / heterometallic