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chondrule

[kon-drool] /ˈkɒn drul/
noun
1.
a small round mass of olivine or pyroxene found in stony meteorites.
Origin
1885-1890
1885-90; chondr- + -ule
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for chondrule

chondrule

/ˈkɒndruːl/
noun
1.
one of the small spherical masses of mainly silicate minerals present in chondrites
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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chondrule in Science
chondrule
  (kŏn'drl)   
A small round granule of olivine or pyroxene occurring in many stony meteorites. Chondrules are thought to have formed from the condensation of hot gases in the solar system.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for chondrule

small, rounded particle embedded in most stony meteorites called chondrites. Chondrules are usually about one millimetre in diameter and consist largely of the silicate minerals olivine and pyroxene. From textural and chemical relationships, it is clear that they were formed at high temperatures as dispersed molten droplets, which subsequently solidified and aggregated into chondritic masses. This process occurred in space in earliest times before the planets accreted. How the chondrules were melted, however, is not understood. It seems likely that dust particles or planetesimals already in existence were melted by high-energy events such as high-velocity collisions and splashed about as droplets that quickly cooled and crystallized

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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