borehole Hear it!

borehole definition

bore·hole (bôr′hōl′)

noun

a hole drilled in the earth to explore for or release oil, gas, water, etc. or to study the crust of the earth

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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