English
homophase
From homo- + phase.
Proto-Indo-European *sem- ‘one, whole’
Proto-Indo-European *somHós ‘same, alike’
Proto-Hellenic *homós
Ancient Greek ὁμός ‘same’
English homo-
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
noun Used attributively to describe separate regions of the same phase (such as grain boundaries)
Language periods are conventional ranges, not dates for this word.
Etymograph / homophase