A little grain a small particle; a pellet.
- A small grain or pellet; a particle.
- Geology A rock or mineral fragment larger than a sand grain and smaller than a pebble, between 2 and 4 millimeters in diameter.
- Astronomy One of the small, transient, brilliant markings in the photosphere of the sun.
- Biology A cellular or cytoplasmic particle, especially one that stains readily.