1) Extinct dog breed 
Rache tʃ, also spelled racch, rach, and ratch, from Old English ræcc, linked to Old Norse rakkí, is an obsolete name for a type of hunting-dog used in Britain in the Middle Ages. It was a scent hound used in a pack to run down and kill game, or bring it to bay. The word appears before the Norman Conquest. It was sometimes confused with `brache....
pack hunting scenting hound (BG 246-47)
• (n.) A dog that pursued his prey by scent, as distinguished from the greyhound.
pack hunting scenting hound (BG 246-47)