Stipple
Part of speech: noun
Definition: the use of small dots that give the appearance of shading; the dots thus used
Part of speech: verb
Definition: to use small dots to give the appearance of shading
Speckle
Part of speech: noun
Definition: A small spot or speck on the skin, plumage or foliage.The random distribution of light when it is scattered by a rough surface.
Part of speech: verb
Definition: To mark with speckles.