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spherulite

[sfer-oo-lahyt, -yoo-, sfeer-] /ˈsfɛr ʊˌlaɪt, -yʊ-, ˈsfɪər-/
noun, Petrology
1.
a rounded aggregate of radiating crystals found in obsidian and other glassy igneous rocks.
Origin
1815-1825
1815-25; spherule + -ite1
Related forms
spherulitic
[sfer-oo-lit-ik, -yoo-, sfeer-] /ˌsfɛr ʊˈlɪt ɪk, -yʊ-, ˌsfɪər-/ (Show IPA),
adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for spherulitic

spherulite

/ˈsfɛrʊˌlaɪt/
noun
1.
any of several spherical masses of radiating needle-like crystals of one or more minerals occurring in rocks such as obsidian
Derived Forms
spherulitic (ˌsfɛrʊˈlɪtɪk) adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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