This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Third-person singular simple present indicative form of mottle.

"On the amorphous yellowing form, mottles are expanding into puddles."

mottled    mottles    mottling   

colour    colourize    colorise    color    color in    colorize    colour in    colourise    coloring    colouring   

mottled    mottling   

spot    maculate   

green-topped    proteanic    yellow-and-black    unwholesome-looking    violet-blue    choriomeningitis    descolada    flu-like    foot-and-mouth    filterable