n. [ Petro + Gr.
n. A carving or drawing on rock, especially one made by prehistoric humans; called also a
a. Of or pertaining to petroglyphs or petroglyphy. [ 1913 Webster ]
n. A carving or drawing on rock, especially one made by prehistoric humans; called also a
a. Of or pertaining to petroglyphs or petroglyphy. [ 1913 Webster ]
n. [ Petro + Gr.