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borehole

[bawr-hohl, bohr-] /ˈbɔrˌhoʊl, ˈboʊr-/
noun, Mining.
1.
a hole drilled in the earth, as for the purpose of extracting a core, releasing gas, oil, water, etc.
Origin of borehole
1700-1710
1700-10; bore2+ hole
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for borehole

borehole

/ˈbɔːˌhəʊl/
noun
1.
a hole driven into the ground to obtain geological information, release water, etc
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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