speckle

Short definition from Wiktionary

Noun

1. 1
   A small spot or speck on the skin, plumage or foliage.
2. 2
   The random distribution of light when it is scattered by a rough surface.
3. 3
   Kind; sort.
4. 4
   A cluster of interchromatin granules in a nucleus.

Verb

1. 1
   To mark with speckles.