arson dog
n.— «Their job is accelerant-detection canine, better known as an arson dog. The Labrador retrievers are trained to sniff out accelerants such as gasoline, kerosene or lighter fluid at a scene when arson is suspected.» —“Sniffing out a fire culprit” by Steve Stein Journal Star (Peoria, Illinois) June 4, 2008. (source: Double-Tongued Dictionary)
Further reading
There was a time when William Shakespeare was just another little seven-year-old in school. Classes in his day were demanding — and all in Latin. A new book argues that this rigorous curriculum actually nurtured the creativity that later flourished...
She sells seashells by the seashore. Who is the she in this tongue twister? Some claim it’s the young Mary Anning, who went on to become a famous 19th-century British paleontologist. Dubious perhaps, but the story of her rise from seaside...