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 History of this Word

"petro" is from "petros" (stone) spoken by people of Greece starting about 1000 B.C.

Notes

In this sense, it is a word added to another word to form a new word.

More words with this prefix,
petrify
petrogale
petrary
petrosal

Words related to this meaning

grammar is modifier

"petro-" is a type of prefix

Definition

A prefix added to the start of a word. Indicates that "stone" or "petroleum" modifies the word. Created to expand meanings. Can be used with many words to form new words.

Examples of how the word is used

petro- illustration Emission monitoring systems are widely used within petrochemical plants.
petro- illustration Guidance is given on how to estimate mineral proportions and how to use the petrological microscope.