variolite

[vair-ee-uh-lahyt var-]
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British Dictionary definitions for variolite

variolite

noun
  1. any basic igneous rock containing rounded bodies (varioles) consisting of radiating crystal fibres
Derived Formsvariolitic (ˌvɛərɪəˈlɪtɪk), adjective

Word Origin for variolite

C18: from variola, referring to the pockmarked appearance of the rock
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