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milk tooth

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noun
  1. one of the temporary teeth of a mammal that are replaced by the permanent teeth.
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Origin of milk tooth

First recorded in 1720–30
Also called baby tooth, deciduous tooth, primary tooth.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for baby tooth

milk tooth

noun
  1. any of the first teeth to erupt; a deciduous toothAlso called: baby tooth See also dentition
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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

baby tooth in Medicine

milk tooth