English

achromatous

From a- + chromato- + -ous.

Formed from a- + chromato- + -ous

Proto-Indo-European *uds- ‘up, out’

Proto-Germanic *uz- ‘out-’

Proto-West Germanic *uʀ- ‘up, out, over’

English a-

Proto-Hellenic *kʰrṓwmə

Ancient Greek χρῶμᾰ ‘color’

Today it means

adj Lacking normal colour; colourless

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

Etymograph / achromatous