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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

granule

Geology a single rock fragment in gravel, smaller than a pebble but larger than a sand grain
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Traczyk, "Sphingolipids of the stratum corneum and lamellar granules of fetal rat epidermis," Journal of Investigative Dermatology, vol.
This results in the formation of lamellar granules which contain polar lipids, proteases and their inhibitors, thereby playing a pivotal role in the development of epidermal barrier function.
It seems that the mutated ABCA 12 gene in harlequin ichthyosis has something to do with the production of the lamellar granules in the upper layers of the skin.
When viewed by electron microscopy, the affected cornified cells are highly irregular in shape, and there is an abnormal accumulation and distribution of the lamellar granules that export the lipids.