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in-and-in

[ in-uhnd-in, -uhn- ]
/ ˈɪn əndˈɪn, -ən- /
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adverb

repeatedly within the same family, strain, etc.: to breed stock in-and-in.

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Origin of in-and-in

First recorded in 1620–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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British Dictionary definitions for in-and-in

in-and-in

adjective

(of breeding) carried out repeatedly among closely related individuals of the same species to eliminate or intensify certain characteristics
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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