1) Having the same color or tint 2) Orthochromatic 1) Orthochromatic 
• (a.) Having the same color; connecting parts having the same color, as lines drawn through certain points in experiments on the chromatic effects of polarized light in crystals.
(i″so-kro-mat´ik) of the same color throughout.
I`so·chro·mat'ic adjective [ Iso- + chromatic .] (Opt.) Having the same color; connecting parts having the same color, as lines drawn through certain points in experiments on the chromatic effects of polarized light in crystals. 
Type: Term Pronunciation: ī′sō-krō-mat′ik Definitions: 1. Of uniform color. 2. Denoting two objects of the same color. Synonyms: isochroous
isochromatic 1. Of uniform color. 2. Denoting two objects of the same color. 3. In optics, having the same color.
having the same color or tint. · orthochromatic.