speckling

/S P EH1 K AH0 L IH0 NG/
verb
  1. 1

    To mark with speckles.

noun
  1. 1

    A pattern of small spots

  2. 2

    Ticking (the fabric)

Source: https://en.wiktionary.org/wiki/speckle, https://en.wiktionary.org/wiki/speckling