orthochromatic

adjective

or·​tho·​chro·​mat·​ic ˌȯr-thə-krō-ˈma-tik 

1

: of, relating to, or producing tone values of light and shade in a photograph that correspond to the tones in nature

2

: sensitive to all colors except red

Word History

Etymology

International Scientific Vocabulary

First Known Use

1887, in the meaning defined at sense 1

Medical Definition

orthochromatic

adjective

or·​tho·​chro·​mat·​ic ˌȯr-thə-krō-ˈmat-ik 

1

: of, relating to, or producing tone values of light and shade in a photograph that correspond to the tones in nature

2

: sensitive to all colors except red

3

: staining in the normal way

orthochromatic tissue

an orthochromatic erythroblast