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A basic rock whose pockmarked appearance is caused by the presence of numerous white, rounded, embedded spherules.
var′i·o·lit′ic (-lĭt′ĭk) adj.
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.