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

Example sentences 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