Meaning of MOTTLE in English

I. noun Etymology: probably back-formation from motley Date: 1676 a colored spot, 2. a surface having colored spots or blotches, the arrangement of such spots or blotches on a surface, mosaic 5, ~d adjective II. transitive verb (~d; mottling) Date: 1676 to mark with spots or blotches of different color or shades of color as if stained, ~r noun

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.