Source : Webster's Revised Unabridged Dictionary (1913)

Sleuthhound \Sleuth"hound`\, n. [See {Sleuth}, and cf.
   {Slothound}.] (Zo["o]l.)
   A hound that tracks animals by the scent; specifically, a
   bloodhound. [Spelt variously {slouthhound}, {sluthhound},
   etc.]

Source : WordNet®

sleuthhound
     n 1: a detective who follows a trail [syn: {sleuth}]
     2: a breed of large powerful hound of European origin having
        very acute smell and used in tracking [syn: {bloodhound}]