petrography

1 of 2

noun

pe·​trog·​ra·​phy pə-ˈträ-grə-fē How to pronounce petrography (audio)
pe-
: the description and systematic classification of rocks
petrographer noun
petrographic adjective
or petrographical
petrographically adverb

petrographic

2 of 2

adjective

pet·​ro·​graph·​ic ¦pe‧trə¦grafik How to pronounce petrographic (audio)
-fēk
variants or petrographical
-fə̇kəl How to pronounce petrographic (audio)
-fēk-
: of or relating to petrography
petrographically
-fə̇k(ə)lē How to pronounce petrographic (audio)
-fēk-
-li
adverb

Examples of petrography in a Sentence

Recent Examples on the Web
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Noun
Representative petrography of these components in the CE6 lunar soils is shown in Supplementary Fig. 6. Keith Cooper, Space.com, 16 July 2025

Word History

Etymology

Noun

petro- + -graphy

Adjective

petrographic probably from (assumed) New Latin petrographicus, from New Latin petrographia petrography + Latin -icus -ic; petrographical from New Latin petrographia + English -ical

First Known Use

Noun

1651, in the meaning defined above

Time Traveler
The first known use of petrography was in 1651

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Cite this Entry

“Petrography.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/petrography. Accessed 25 Jun. 2026.

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