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.
stool. n. 1. (Furniture) a backless seat or footrest consisting of a small flat piece of wood, etc, resting on three or four legs, a pedestal, etc. 2. (Botany) a rootstock or base of a plant, usually a woody plant, from which shoots, etc, are produced. 3. (Botany) a cluster of shoots growing from such a base.