petroglyphic
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pet·ro·glyph
(pĕt′rə-glĭf′)n.
A carving or incised drawing on rock, especially one made by prehistoric people.
pet′ro·glyph′ic 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.
petroglyphic
(ˌpɛtrəˈɡlɪfɪk)adj
(Palaeontology) relating to or having the characteristics of a petroglyph or carving made in rock
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014