petrogram
[ pe-truh-gram ]
/ ˈpɛ trəˌgræm /
noun
a drawing or painting on rock, especially one made by a member of a prehistoric people.
Words nearby petrogram
petrodollars,
petrog.,
petrogenesis,
petroglyph,
petrograd,
petrogram,
petrograph,
petrography,
petrol,
petrol bomb,
petrol engine