Astronomy: General

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granulation

A Dictionary of Astronomy | 1997 | Copyright

granulation A mottling of the Sun's photosphere caused by numerous small light areas called granules. Individual granules are as much as 1000 km across, and may have polygonal shapes. They are separated from each other by darker intergranular lanes, about 400 K cooler than granules. Granule lifetimes are around 20 min, their birth being from the fragments of previous granules and their demise from fragmentation, fading, or sometimes explosion into small fragments. Granules are elongated near sunspots, and also occur within sunspot umbrae (umbral dots). Spectroscopic observations suggest that granules are convection cells of rising hot gas (see convective overshoot), the intergranular lanes marking regions of descending cooler gas.

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granulation

A Dictionary of Nursing | 2008 | Copyright

granulation (gran-yoo-lay-shŏn) n. the formation of a multicellular mass of tissue (g. tissue) in response to an injury: this is an essential part of the healing process. The tissue contains many new blood vessels and many fibroblasts.

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granulation

A Dictionary of Earth Sciences | 1999 | | Copyright

granulation The comminution, during deformation, of crystals into smaller grains of equal size which are then able to rotate in relation to one another. The process is a common feature of plastic deformation in granitoids.

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AILSA ALLABY and MICHAEL ALLABY. "granulation." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "granulation." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O13-granulation.html

AILSA ALLABY and MICHAEL ALLABY. "granulation." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-granulation.html

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