- a rock embedded with varioles; a variolitic rock.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any basic igneous rock containing rounded bodies (varioles) consisting of radiating crystal fibres
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