Definify.com

Webster 1828 Edition

ppr.

Marking with dots or spots; diversifying with small detached objects.

dotting

dotting ‎(plural dottings)

A dotted pattern; a speckling.
- 2011, Claire Messud, The Emperor's Children (page 19)
  There was little to be done about the stubborn dottings of mold on the basement wall (she blamed the aluminum siding, after all these years, which kept the house from breathing) or in a patch on the blue bathroom lino behind the toilet.