petrology

As a noun petrology

is (geology) the study of the origin, composition and structure of rock.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between petrology and lithology

is that petrology is the study of the origin, composition and structure of rock while lithology is the study of rocks, with particular emphasis on their description and classification.

As a noun petrology is

(geology) the study of the origin, composition and structure of rock.

Petrogenince is likely misspelled.

Petrogenince has no English definition.

As a noun petrology is

the study of the origin, composition and structure of rock.

As nouns the difference between petrology and petralogy

is that petrology is the study of the origin, composition and structure of rock while petralogy is alternative form of lang=en.

As nouns the difference between metrology and petrology

is that metrology is the science of weights and measures or of measurement while petrology is the study of the origin, composition and structure of rock.

As nouns the difference between patrology and petrology

is that patrology is the study of the lives and works (especially the writings) of the church fathers while petrology is (geology) the study of the origin, composition and structure of rock.

As nouns the difference between taxonomy and petrology

is that taxonomy is the science or the technique used to make a classification while petrology is (geology) the study of the origin, composition and structure of rock.

As a noun petrology is

(geology) the study of the origin, composition and structure of rock.