in-and-in

[ in-uhnd-in, -uhn- ]

adverb

1. repeatedly within the same family, strain, etc.:

   to breed stock in-and-in.

in-and-in

adjective

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

Word History and Origins

Origin of in-and-in¹

First recorded in 1620–30

Example Sentences

They were also closely bred in-and-in, seldom or never departing from a particular flock to procure a fresh cross.

From Project Gutenberg

Many, perhaps, will see an additional cause in teleological considerations, aiming at the avoidance of in-and-in breeding.

From Project Gutenberg

The system of breeding in-and-in proves, in fact, as destructive to flocks, as marriages of near relations to the human kind.

From Project Gutenberg

I never knew a more in-and-in-bred seaman, who, when one resource failed, invariably set about the next best visible expedient.

From Project Gutenberg

In the latter case breeding in-and-in is usually found to result in decided and rapid deterioration.

From Project Gutenberg