chromato-, chromat-, chromo-, chrom-, chro-, -chrome, -chromasia, -chromia, -chromatism, -chromatic, -chromatically, -chromy

(Greek: color)

achromatic, achromic (adjective); more achromatic, more achromic; most achromatic, most achromic
1. A reference to being without color; colorless; unpigmented: Patty's achromatic skin appeared to be a result of her seclusion and being away from the outdoor gardens at the castle.
2. White, gray, or black in appearance: Leland's achromatic photographs were very famous.
3. Transmitting light without any constituent color separation; such as, a lens: The expensive camera was equipped with a specialized lens to allow Irving to take better achromic photographs.
achromatophil, achromophil (noun); achromatophils; achromophils (pl)
A tissue which is not stainable in the usual way: An achromatophil can be a cell that is unable to be coloured by histologic or bacteriologic dyes or tints.
achromatopsia (s) (noun), achromatopsias )pl)
A rare form of color vision impairment in which the world is seen only in black, white, and shades of gray.

This hereditary disorder of sight is the result of a lack of cone vision; that type of vision which is provided by the cone photoreceptors in the retina.

In the normal human eye, it is estimated that there are about six million cone photoreceptors that are located largely in the center of the retina.

Lacking cone photoreceptors, people with achromatopsia must rely on their rod photoreceptors. There are approximately 100 million rod photoreceptors which are located mainly around the periphery of the retina.

Rods saturate at higher levels of illumination and do not provide color vision or good detail vision.

A grayness of hair.
achromoderma (s) (noun), achromodermas (pl)
An absence of skin pigment.