made by art; not natural or pathologic. 1  artificial respiration any method of forcing air into the lungs in a person who still has a pulse but whose breathing has stopped. Artificial respiration can be given with no equipment, so that it is an ideal emergency first aid procedure. 2  Indications.
stool pigeon - someone acting as an informer or decoy for the police. canary, fink, snitch, stoolie, stoolpigeon, sneaker, snitcher, sneak. betrayer, blabber, informer, squealer, rat - one who reveals confidential information in return for money.
The domestic pigeon (Columba livia) (also called the rock dove or city pigeon) was originally found in Europe, Northern Africa, and India. Early settlers introduced it into the eastern United States as a domestic bird in the 1600s.