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 ?
Embryonic precursor cells from the rhombic lip are specified to a cerebellar granule neuron identity.
Nordihydroguaiaretic acid activates the antioxidant pathway Nrf2/H0-1 and protects cerebellar granule neurons against oxidative stress.
Consider the pine needle-like extensions of granule neurons, which help memories form deep in the brain; the behemoth, feathery Purkinje neurons that coordinate body movements; and the twinkly stellate interneurons that help transmit visual signals.
In the cerebellum, PAS highlighted cytoplasmic granules in the granule neurons, in the dentate nucleus, and particularly in the Bergmann glia.
However, in the region of the brain known as the cerebellum, Atoh1 is active after birth in the fast-dividing granule neuron precursor (GNPs) cells that eventually stop dividing and become mature granule neurons.
Early acute necrosis, delayed apoptosis and cytoskeletal breakdown in cultured cerebellar granule neurons exposed to methylmercury.