granule

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granule,

in astronomy: see photospherephotosphere,
luminous, apparently opaque layer of gases that forms the visible surface of the sun or any other star. The photosphere lies between the dense interior gases and the more attenuated gases of the chromosphere.
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granule

[′gran·yül]
(astronomy)
A convective cell in the solar photosphere, about 600 miles (1000 kilometers) in diameter.
(geology)
A somewhat rounded rock fragment ranging in diameter from 2 to 4 millimeters; larger than a coarse sand grain and smaller than a pebble.

granule

Geology a single rock fragment in gravel, smaller than a pebble but larger than a sand grain
References in periodicals archive ?
The myeloid blasts in t(8; 21) AML are large, with abundant basophilic cytoplasm, with perinuclear hofs, occasional to numerous azurophilic granules, and blunted Auer rods.
1,2) The appearance of TG is the result of an increase in acid mucosubstance in azurophilic granules, which stains more prominently than under normal circumstances.
Activity of tissue MPO, an enzyme that is found predominantly in the azurophilic granules of polymorphonuclear leukocytes, correlates with the number of polymorphonuclear neutrophils determined histochemically in the inflamed tissues; it is therefore used as an indication of tissue neutrophil accumulation.