achromatic

English edit

From Ancient Greek ἀχρωμάτιστος (akhrōmátistos, “uncolored”), from ἀ- (a-, “not”) + χρῶμα (khrôma, “color”); compare French achromatique.

achromatic (comparative more achromatic, superlative most achromatic)

(optics) Free from color; transmitting light without color-related distortion.
Synonyms: see Thesaurus:achromatic
Containing components such as achromatic lenses and prisms, designed to prevent color-related distortion.
(biology) Uncolored; not absorbing color from a fluid; -- said of tissue
(music) Having only the diatonic notes of the scale; not modified by accidentals.
Being achromatic in subject
The lecture was achromatic, the speaker used politics to suppress the weight of his/her subject.

optics: free from colour

containing components to prevent colour-related distortion

biology: uncoloured

music: having only the diatonic notes of the scale

being achromatic in subject