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wisdom tooth

noun
1.
the third molar on each side of the upper and lower jaws: the last tooth to erupt.
Idioms
2.
cut one's wisdom teeth, to attain maturity or discretion.
Origin
1660-1670
1660-70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for wisdom tooth

wisdom tooth

noun
1.
any of the four molar teeth, one at the back of each side of the jaw, that are the last of the permanent teeth to erupt Technical name third molar
2.
cut one's wisdom teeth, to arrive at the age of discretion
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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wisdom tooth in Medicine

wisdom tooth wis·dom tooth (wĭz'dəm)
n.
The third molar tooth on both sides of each jaw that erupts from the 17th to the 23rd year.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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wisdom tooth in Science
wisdom tooth
  (wĭz'dəm)   
One of four molars, the last on each side of both jaws in humans, usually appearing in young adulthood.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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12
13
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