Tachisme is a French style of abstract painting popular in the 1940s and 1950s. The term is said to have been first used with regards to the movement in 1951. It is often considered to be the European equivalent to abstract expressionism, although there are stylistic differences.
Abstract Imagists is a term derived from a 1961 exhibition in the Guggenheim Museum, New York called American Abstract Expressionists and Imagists. This exhibition was the first in the series of programs for the investigation of tendencies in American and European painting and sculpture.