Advertisement

petro- (1)

before vowels petr-, word-forming element used from 19c., indicating "rock, stone" (in anatomy it refers to the petrous parts of certain bones), from Greek petros "stone, boulder," petra "rock, rocky mountain range, cliff" (see petrous).

petro- (2)

word-forming element used from mid-20c. to mean "of or having to do with petroleum products," from petroleum.

Others are reading

Advertisement