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 ?
Autoantibodies to GP2, the major zymogen granule membrane glycoprotein, are new markers in Crohn's disease.
It has been consistently shown in various animal models that one of the first events in acute experimental pancreatitis consists of the premature activation of digestive enzymes within the acinar cell by co-segregation of zymogen granules with lysosomal enzymes, particularly cathepsin B.
These are large, polygonal cells with abundant and lightly basophilic and granular cytoplasm that contains dense, blue-purple, fine to coarse zymogen granules (figure 2).