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petro

[pe-troh] /ˈpɛ troʊ/
adjective
1.
of or relating to petroleum or the petroleum industry.
noun
2.
Canadian. the federally owned petroleum industry.
Origin of petro
1970-1975
1970-75; independent use of petro-2

petro-1

1.
a combining form meaning “rock,” “stone,” used in the formation of compound words:
petrology.
Also, petri-; especially before a vowel, petr-.
Origin
< Greek, combining form of pétra rock, pétros a stone

petro-2

1.
a combining form meaning “petroleum,” “the extraction and export of petroleum,” used in the formation of compound words:
petrochemistry; petropower.
Origin
extracted from petroleum
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for petro
Contemporary Examples
Historical Examples
  • petro, however, could never bear to refuse any one a favour, even if granting it were an uncongenial task.

    Winnie Childs C. N. Williamson
  • So bad luck had come not only to Eve and petro, but to the story of their lives.

    Bird Stories Edith M. Patch
  • Logan seized the other, and petro, following his host's example, drew up to the table.

    Winnie Childs C. N. Williamson
  • Oh, petro, don't be horrid, just when I really need you to be nice.

    Winnie Childs C. N. Williamson
  • There was petro's chance to score, and—right or wrong—he took it.

    Winnie Childs C. N. Williamson
British Dictionary definitions for petro

petro-

combining form
1.
indicating stone or rock: petrology
2.
indicating petroleum, its products, etc: petrochemical
3.
of or relating to a petroleum-producing country: petrostate
Word Origin
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
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Word Origin and History for petro

petro-

before vowels petr-, word-forming element used from 19c., from comb. form of Greek petros "stone," petra "rock" (see petrous).

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

Online Etymology Dictionary, © 2010 Douglas Harper
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petro in Medicine

petro- or petri- or petr-
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.
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