achromatic, neutral
(adjective) having no hue; “neutral colors like black or white”
Source: WordNet® 3.1
achromatic (comparative more achromatic, superlative most achromatic)
(optics) Free from color; transmitting light without color-related distortion.
Synonym: 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
Source: Wiktionary
Ach`ro*mat"ic, a. Etym: [Gr. achromatique.]
1. (Opt.)
Definition: Free from color; transmitting light without decomposing it into its primary colors.
2. (Biol.)
Definition: Uncolored; not absorbing color from a fluid; -- said of tissue. Achromatic lens (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed.
– Achromatic prism. See Prism.
– Achromatic telescope, or microscope, one in which the chromatic aberration is corrected, usually by means of a compound or achromatic object glass, and which gives images free from extraneous color.
Source: Webster’s Unabridged Dictionary 1913 Edition
28 February 2025
(adjective) pertaining to giving directives or rules; “prescriptive grammar is concerned with norms of or rules for correct usage”
International Coffee Day (September 29) is an occasion to promote and celebrate coffee as a beverage, with events occurring in places across the world. A day to promote fair trade coffee and raise awareness for the coffee growers’ plight. Other countries celebrate this event on October 1.
