popper

Noun

• a container for cooking popcorn

• a container of stimulant drug (amyl nitrate or butyl nitrite)

• British philosopher (born in Austria) who argued that scientific theories can never be proved to be true, but are tested by attempts to falsify them (1902-1994)

Related words

• Synonyms: 
  Popper , Karl Popper , Sir Karl Raimund Popper