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
7 June 2025
(noun) a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years
Coffee starts as a yellow berry, changes into a red berry, and then is picked by hand to harvest. The red berry is de-shelled through a water soaking process and what’s left inside is the green coffee bean. This bean then dries in the sun for 3-5 days, where it is then packed and ready for sale.
