Meaning of ACHROMATIC in English

adjective Date: 1766 refracting light without dispersing it into its constituent colors ; giving images practically free from extraneous colors , not readily colored by the usual staining agents, possessing no hue ; being or involving black, gray, or white ; neutral , being without accidentals or modulation ; diatonic , ~ally adverb achromatism noun achromatize transitive verb

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.