granule

(redirected from Birbeck granules)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Birbeck granules: ferruginous bodies, Langerhans cell histiocytosis, Merkel cells

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.
..... Click the link for more information.
.

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 ?
As LCH is also a proliferating disorder of Langerhans cells, LCH stains positive for CD1a and S-100 protein, and at times exhibits Birbeck granules, as does LCS.
The Birbeck granule, a trilaminar rod-like organelle with a terminal expansion resembling a tennis racquet, is distinctive.
Langerhans cell histiocytosis is a neoplastic proliferation of Langerhans cells, demonstrating immunohistochemical expression of CD1A and S100 as well as ultrastructural evidence of Birbeck granules.