stipple in WordNet English dictionary

1. produce a mottled effect
   "The sunlight stippled the trees"
   stipple  speckle 
   
2. engrave by means of dots and flicks
   stipple 
   
3. make by small short touches that together produce an even or softly graded shadow, as in paint or ink
   stipple 
   
4. apply (paint) in small dots or strokes
   stipple