granules

noun
  1. 1

    A tiny grain, a small particle.

  2. 2

    A small structure in a cell.

  3. 3

    A particle from 2 to 4 mm in diameter, following the Wentworth scale

  4. 4

    A small mark in the photosphere of the sun caused by convection currents. See also Wikipedia:Granule (solar physics).

Source: https://en.wiktionary.org/wiki/granule, https://en.wiktionary.org/wiki/granules