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

Kevin Harvick’s nearly flawless run Sunday ruined any chance of Jimmie Johnson executing his in-and-in playoff strategy.

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It follows from this that where there is much in-and-in breeding the weight of mediocrity will be less, and the peculiarities of the breed will be accentuated.

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When uniformity of plumage can be effected in mixed breeds or varieties without a resort to in-and-in, or close breeding, and without sacrificing the health and vigor of the race, it is desirable; and, in many instances, it can be accomplished in a satisfactory manner.

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Most breeds of the hen kind degenerate rapidly from close, or in-and-in breeding, because they are not perfect of their kind; that is, the breed is not pure, but of mixed blood; and in such objectionable breeding, the race degenerates just in proportion as the breed is imperfect, or impure.

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Few domesticated animals suffer so much from in-and-in breeding as swine.

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