granule
nounUK /ˈɡrænjuːl/
US /ˈɡrænjuːl/
A granule is a very tiny piece of something, like a little grain.
She poured a granule of sugar into her tea.
OTHER MEANINGS
2. A small pill or pellet containing medicine.
The doctor gave him a granule to swallow with water.
3. A tiny cell or structure inside a cell, such as a starch granule.
Under the microscope, we saw a starch granule in the plant cell.
4. A small bright spot on the sun's surface.
Astronomers observed a granule on the sun's photosphere.