granule

/ˈɡrænjuːl/
noun
  1. A small, hard piece or grain of something.
    • A single granule of salt can be seen under a microscope.
    • The coffee grounds were ground into tiny granules for a smoother brew.
    • Each granule of sand on the beach is unique.
  2. A small, rounded particle of a substance, especially in medicine or science.
    • The fertilizer comes as blue granules that dissolve slowly in soil.
    • In biology class, we observed starch granules inside plant cells.
    • The doctor prescribed a medication in the form of granules to mix with water.
Antonyms