inbreeding
inb ree ding
- n the act of mating closely related individuals
 
- This inbreeding has developed great sprinting speed.
 - Since French literary inbreeding is both chronic and severe, it was inevitable that sooner or later someone would devote a whole book to Camus' throwaway idea.
 - The community has paid a price for its separateness: because the Amish forbid marriage outside the Old Order, centuries of inbreeding have afflicted them with certain genetic .