petrograph

from The Collaborative International Dictionary of English v.0.48

petrograph \pet"ro*graph`\ (p[e^]t"r[-o]*gr[a^]f`), n.
   A carving or drawing on rock, especially one made by
   prehistoric humans; called also a {petrograph}.
   [PJC] Petrographic

from The Collaborative International Dictionary of English v.0.48

petroglyph \pet"ro*glyph`\ (p[e^]t"r[-o]*gl[i^]f`), n.
   A carving or drawing on rock, especially one made by
   prehistoric humans; called also a {petrograph}.
   [PJC]

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