| PETROGENY | • petrogeny n. The science of the origin of rocks. • PETROGENY n. the study of the origin of rocks. |
| PETROGRAM | • petrogram n. (Archaeology) A painting on rock, especially one made in prehistoric times. • PETROGRAM n. a picture on stone. |
| PETROGLYPH | • petroglyph n. (Archaeology) A rock carving, especially one made in prehistoric times. • PETROGLYPH n. an ancient rock-carving. |
| PETROGRAMS | • petrograms n. Plural of petrogram. • PETROGRAM n. a picture on stone. |
| PETROGENIES | • PETROGENY n. the study of the origin of rocks. |
| PETROGLYPHS | • petroglyphs n. Plural of petroglyph. • PETROGLYPH n. an ancient rock-carving. |
| PETROGLYPHY | • petroglyphy n. The art or process of carving figures or inscriptions on stone. • PETROGLYPHY n. the art of carving on rocks. |
| PETROGRAPHY | • petrography n. (Petrology) The branch of petrology that deals with the scientific description and classification of rocks. • petrography n. The art of writing on stone. • PETROGRAPHY n. the description and classification of rocks. |
| PETROGENESES | • petrogeneses n. Plural of petrogenesis. • PETROGENESIS n. formation or development of rocks. |
| PETROGENESIS | • petrogenesis n. The branch of petrology dealing with the origin of igneous rocks. • PETROGENESIS n. formation or development of rocks. |
| PETROGENETIC | • petrogenetic adj. (Geology) Of or pertaining to petrogenesis, the creation of new rock. • PETROGENETIC adj. relating to petrogenesis. |
| PETROGLYPHIC | • petroglyphic adj. Of or pertaining to petroglyphy. • PETROGLYPHIC adj. of or like a petroglyph, an ancient rock-carving. |
| PETROGRAPHER | • petrographer n. A person practicing petrography. • PETROGRAPHER n. a practitioner of petrography. |
| PETROGRAPHIC | • petrographic adj. Relating to petrographs. • petrographic adj. Relating to petrography. • PETROGRAPHIC adj. relating to petrography, also PETROGRAPHICAL. |
| PETROGLYPHIES | • PETROGLYPHY n. the art of carving on rocks. |
| PETROGRAPHERS | • petrographers n. Plural of petrographer. • PETROGRAPHER n. a practitioner of petrography. |
| PETROGRAPHIES | • petrographies n. Plural of petrography. • PETROGRAPHY n. the description and classification of rocks. |
| PETROGRAPHICAL | • petrographical adj. Alternative form of petrographic. • PETROGRAPHICAL adj. relating to petrography, also PETROGRAPHIC. |