the branch of petrology dealing with the description and classification of rocks, especially by microscopic examination.
Origin of petrography
Related formspe·trog·ra·pher, nounpet·ro·graph·ic [pe-truh-graf-ik] /ˌpɛ trəˈgræf ɪk/, pet·ro·graph·i·cal, adjectivepet·ro·graph·i·cal·ly, adverb
From the New Latin
dating back to 1645–55.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for petrography
Historical Examples of petrography
A faint buzz above the ceiling witnessed that petrography, too, was active.
Petrog′lyphy, the art of writing on rocks or stones; Petrog′rapher, a student of petrography.
Petrography and laboratory psychology were among the new sciences fostered by the new university.
A more general name sometimes employed is that of Petrography.
Thus from mineralogy and petrography it contains information regarding the origin and subsequent mutations of minerals and rocks.
British Dictionary definitions for petrography
Derived Formspetrographer, nounpetrographic (ˌpɛtrəˈɡræfɪk) or petrographical, adjectivepetrographically, adverb
the branch of petrology concerned with the description and classification of rocksAbbreviation: petrog
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
The description and classification of rocks, especially by means of microscopic analysis.
The American Heritage® Science Dictionary
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