hydraulic fracturing(redirected from Frac job)
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The process of extracting oil or natural gas by injecting a mixture of water, sand or gravel, and certain chemicals under high pressure into well holes in dense rock to create fractures that the sand or gravel holds open, allowing the oil or gas to escape. Also called fracking.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.