Bloodhound
WordNet
noun
(1) A breed of large powerful hound of European origin having very acute smell and used in tracking
WiktionaryText
Etymology
From + . The detective sense follows from the dog's ability to follow a trail.
Noun
- A large scenthound famed for its ability to follow a scent many days old, over vast distances. This dog is often used as a police dog to track missing people, fleeing suspects, or escaped prisoners.
- A detective or other person skilled at finding people or clues.