Main Entry: tach·ism

Pronunciation: \ˈta-ˌshi-zəm\

Function: noun

Usage: often capitalized

Etymology: French tachisme, from tache stain, spot, blob, from Old French teche, tache, of Germanic origin; akin to Old Saxon tēkan sign, Old High German zeihhan — more at token

Date: 1955

: action painting

— tach·ist \ˈta-shist\ also ta·chiste \ta-ˈshēst\ adjective or noun often capitalized