The definition of a possum, or opossum, is a tree-dwelling nocturnal marsupial with fur and a prehensile tail. A small Australian mammal that lives in a tree and only comes out at night is an example of a possum. possum. possum.
More than two thirds of patients who die of anaphylaxis do so within the first: half hour. ____, a harsh, high-pitched inspiratory sound, occurs when swelling in the upper airway closes off the airway; the swelling can eventually lead to total obstruction. Stridor.
Anaphylaxis is the most severe form of an allergic reaction. Anaphylaxis, also called an anaphylactic reaction or allergic shock, can be fatal. Anaphylaxis develops rapidly, often within minutes, and is a life-threatening condition that requires immediate emergency care.