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petrography
CIDE DICTIONARY
petrography, n. [Petro + -graphy.].
- The art of writing on stone. [1913 Webster]
- The scientific description of rocks; that department of science which investigates the constitution of rocks; petrology. [1913 Webster]
OXFORD DICTIONARY
petrography, n. the scientific description of the composition and formation of rocks.
Derivative
petrographer n. petrographic adj. petrographical adj.
For further exploring for "petrography" in Webster Dictionary Online