achromatic

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

• (US, UK) IPA^(key): /ˌæk.ɹəˈmæt.ɪk/, /ˌeɪ.kɹəˈmæt.ɪk/

• Audio (Southern England)

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achromatic (comparative more achromatic, superlative most achromatic)

1. (optics) Free from color; transmitting light without color-related distortion.

   Synonyms: see Thesaurus:achromatic

2. Containing components such as achromatic lenses and prisms, designed to prevent color-related distortion.
3. (biology) Uncolored; not absorbing color from a fluid; -- said of tissue
4. (music) Having only the diatonic notes of the scale; not modified by accidentals.
5. Being achromatic in subject

   The lecture was achromatic, the speaker used politics to suppress the weight of his/her subject.