Etymograph

English

hemianopsia

From hemi- + an- + -opsia.

A compound of hemi- + an- + -opsia

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

Proto-Indo-European *sēmi ‘half’

English hemi-

Proto-Indo-European *h₂en- ‘on, onto’

Proto-Germanic *ana- ‘on’

Proto-West Germanic *ana- ‘Forming verbs and adjectives from participles…’

English an-

Today it means

noun Blindness in one half of the field of vision of either or both eyes.

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

Etymograph / hemianopsia