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There are 18 words beginning with PETROG

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.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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English Wiktionary: 31 words
Scrabble in French: 12 words
Scrabble in Spanish: 8 words
Scrabble in Italian: 13 words
Scrabble in German: 1 word
Scrabble in Romanian: 45 words

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