in-and-in

[ in-uh nd-in, -uh n- ]
/ ˈɪn əndˈɪn, -ən- /

adverb

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

Origin of in-and-in

First recorded in 1620–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for in-and-in

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