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spherulite

American  
[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.

spherulite British  
/ ˌsfɛrʊˈlɪtɪk, ˈsfɛrʊˌlaɪt /

noun

  1. any of several spherical masses of radiating needle-like crystals of one or more minerals occurring in rocks such as obsidian

"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

Other Word Forms

  • spherulitic adjective

Etymology

Origin of spherulite

First recorded in 1815–25; spherule + -ite 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.