Meaning of ACHROMATIC in English

ACHROMATIC

|akrə|mad.ik, -rō, -atik, -ēk adjective

Etymology: Greek achrōmatos + English -ic

1. : free from color : refracting light without dispersing it into its constituent colors : giving images practically free from extraneous colors

an achromatic telescope

an achromatic microscope objective

2. biology : uncolored : not readily colored by the usual staining agents

achromatic part of a cell

— see achromatic figure

3.

a. : possessing no hue : totally lacking in saturation : neutral

b. : black, gray, or white

4. music : without accidentals or modulation : diatonic

• ach·ro·mat·i·cal·ly -ə̇k(ə)lē, -ēk-, -li adverb

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.