blood·hound

[bluhd-hound]
noun
1.
one of a breed of medium- to large-sized dogs, usually having a black-and-tan coat, very long ears, loose skin, and an acute sense of smell: used chiefly for following human scents.
2.
a person who is a steadfast pursuer.

Origin:
1300–50; Middle English blod-hound. See blood, hound1

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World English Dictionary
bloodhound (ˈblʌdˌhaʊnd) [Click for IPA pronunciation guide]
 
n
1.  a large breed of hound having a smooth glossy coat of red, tan, or black and loose wrinkled skin on its head: formerly much used in tracking and police work
2.  informal a detective

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Bloodhound is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a chattering or flighty, light-headed person.
Example sentences
People have come to trust the service to act as a digital bloodhound.
Fish can smell much better than people can and even better than a bloodhound.
The unit has six patrol dogs, ten explosive detector dogs and one bloodhound tracker dog.
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