fulgurite(redirected from "petrified lightning")
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ful·gu·rite(fo͝ol′gyə-rīt′, -gə-, fŭl′-)
A slender, usually tubular body of glassy rock produced by lightning striking and then fusing dry sandy soil.
[Latin fulgur, lightning; see fulgurate + -ite.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Minerals) a tube of glassy mineral matter found in sand and rock, formed by the action of lightning
[C19: from Latin fulgur lightning]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014