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Related to oncolite: pisolite
A spherical stromatolite that usually forms around a fragment of detritus such as a piece of shell or a grain of sand.
[Greek onkos, mass; see oncology + -lite.]
on′co·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.