Dictionary.com

petro

[ pe-troh ]
/ ˈpɛ troʊ /
Save This Word!

adjective

of or relating to petroleum or the petroleum industry.

noun

Canadian. the federally owned petroleum industry.

QUIZZES

QUIZ YOURSELF ON AFFECT VS. EFFECT!

In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.

Origin of petro

First recorded in 1970–75; independent use of petro-2

Definition for petro (2 of 3)

petro-1

a combining form meaning “rock,” “stone,” used in the formation of compound words: petrology.
Also petri-; especially before a vowel, petr-.

Origin of petro-

1
<Greek, combining form of pétra rock, pétros a stone

Definition for petro (3 of 3)

petro-2

a combining form meaning “petroleum,” “the extraction and export of petroleum,” used in the formation of compound words: petrochemistry; petropower.

Origin of petro-

2
Extracted from petroleum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for petro

petro-

before a vowel petr-


combining form

indicating stone or rockpetrology
indicating petroleum, its products, etcpetrochemical
of or relating to a petroleum-producing countrypetrostate
from Greek petra rock or petros stone
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

Medical definitions for petro

petro-

pref.

Rock; stone; stone-like hardness:petrous.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Learning At Home Just Got Easier!