pet·ro·glyph (p?t?r?-gl?f?)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.petroglyph (?p?tr???l?f) n (Palaeontology) a drawing or carving on rock, esp a prehistoric one[C19: via French from Greek petra stone + gluph? carving]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014pet?ro?glyph (?p? tr??gl?f) n. a prehistoric drawing or carving on rock. Also called pet?ro?graph (-?græf, -?gr?f) [1865?70;