
1) Granule
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https://www.crosswordclues.com/clue/chondrule

Chondrules (from Ancient Greek χόνδρος chondros, grain) are round grains found in chondrites. Chondrules form as molten or partially molten droplets in space before being accreted to their parent asteroids. Because chondrites represent one of the oldest solid materials within our solar system and are believed to be the building blocks of th...
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http://en.wikipedia.org/wiki/Chondrule

• (n.) A peculiar rounded granule of some mineral, usually enstatite or chrysolite, found imbedded more or less abundantly in the mass of many meteoric stones, which are hence called chondrites.
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http://thinkexist.com/dictionary/meaning/chondrule/

small, rounded particle embedded in most stony meteorites called chondrites. Chondrules are usually about one millimetre in diameter and consist ... [4 related articles]
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http://www.britannica.com/eb/a-z/c/77

Cross-section of a chondrule in a small H5 chondrite found in about 1960 in Riverton, Manitoba A roughly spherical aggregate of coarse crystals formed from the rapid cooling and solidification of a melt at about 1400°C. Large numbers of chondrules are found in all chondrites except for the ...
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http://www.daviddarling.info/encyclopedia/C/chondrule.html
Chon'drule noun [ Dim. from Greek ... a grain (of wheat or spelt), cartilage.]
(Min.) A peculiar rounded granule of some mineral, usually enstatite or chrysolite, found imbedded more or less abundantly in the mass of many meteoric stones, which are hence called
chondrites .
Found on
http://www.encyclo.co.uk/webster/C/71

Small, glassy spheres commonly found in meteorites.
Found on
http://www.seasky.org/astronomy/astronomy-glossary.html

[
n] - small granule (of e.g. chrysolite) found in some meteoric rocks
Found on
http://www.webdictionary.co.uk/definition.php?query=chondrule
noun small granule (of e.g. chrysolite) found in some meteoric rocks
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https://www.encyclo.co.uk/local/20974

a small round mass of olivine or pyroxene found in stony meteorites.
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https://www.infoplease.com/dictionary/chondrule
No exact match found.