Granule definition

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, luminous markings in the photosphere of the sun.

(biology) A cellular or cytoplasmic particle, especially one that stains readily.

A small grain.

A small, grainlike particle or spot; specif., any of the small, bright areas on the sun's photosphere that last only a few minutes.

A small grain or pellet; a particle.

(biology) A cellular or cytoplasmic particle, especially one that stains readily.

A rock or mineral fragment larger than a sand grain and smaller than a pebble. Granules have a diameter between 2 and 4 mm (0.08 and 0.16 in) and are often rounded.

Any of the small, transient convective cells within the Sun's photosphere where hot gases rise and quickly dissipate. Granules are generally between a few hundred and 1,500 km in width. They completely cover the Sun's surface, giving it its characteristic grainy or stippled look, and form and break up within a matter of minutes.

An aggregate of enclosed grainy matter found in a cell. Granulocytes, mast cells and other cells contain granules in their cytoplasm, which differ in size and can often be identified by a characteristic laboratory stain based on their composition. Granules produce and store biologically active substances, the release of which is called degranulation . The granules of granulocytes contain mostly multiple enzymes and other proteins; those of mast cells contain histamine and other chemical mediators.