English
heterophase
From hetero- + phase.
Proto-Indo-European *sem- ‘one, whole’
Proto-Indo-European *sḿ̥teros
Proto-Hellenic *hə́teros
Ancient Greek ἕτερος ‘other, another, different’
English hetero-
Proto-Indo-European *bʰeh₂- ‘to shine’
…
Proto-Hellenic *pʰáňňō ‘to appear’
Ancient Greek φαίνω ‘to bring to light; to appear’
Ancient Greek φάσις ‘appearance’
New Latin phasis
English phase
Today it means
adj Involving different phases (of matter)
Language periods are conventional ranges, not dates for this word.
Etymograph / heterophase