|1.||a person or thing that pops|
|2.||(Brit) an informal name for press stud|
|3.||chiefly (US), (Canadian) a container for cooking popcorn in|
|4.||slang an amyl nitrite capsule, which is crushed and its contents inhaled by drug users as a stimulant|
|Sir Karl. 1902--94, British philosopher, born in Vienna. In The Logic of Scientific Discovery (1934), he proposes that knowledge cannot be absolutely confirmed, but rather that science progresses by the experimental refutation of the current theory and its consequent replacement by a new theory, equally provisional but covering more of the known data. The Open Society and its Enemies (1945) is a critique of dogmatic political philosophies, such as Marxism. Other works are The Poverty of Historicism (1957), Conjectures and Refutations (1963), and Objective Knowledge (1972)|
popper pop·per (pŏp'ər)
An ampoule of amyl nitrite or butyl nitrite used as a stimulant drug.
drug once commonly used in the treatment of angina pectoris, a condition characterized by chest pain precipitated by oxygen deficiency in the heart muscle. Amyl nitrite is one of the oldest vasodilators (i.e., agents that expand blood vessels). The drug is useful in treating cyanide poisoning. Amyl nitrite, a clear, pale yellow liquid with a penetrating odour, is administered by inhalation and is very rapidly absorbed from the lungs. Its action is nonspecific; i.e., it affects all smooth muscles, causing them to relax. Side effects include headache, increased heart rate (tachycardia), and low blood pressure (hypotension).
Learn more about popper with a free trial on Britannica.com.