tachism

[tash-iz-uh m]
Also ta·chisme [French ta-shees-muh] /French taˈʃis mə/.

Origin of tachism

1950–55; < French tachisme, equivalent to tache spot, (< Vulgar Latin *tacca, probably < Gothic taikns mark, akin to token) + -isme -ism
Related formstach·ist, ta·chiste [French ta-sheest] /French taˈʃist/, noun, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for tachisme

tachisme

noun
  1. a type of action painting evolved in France in which haphazard dabs and blots of colour are treated as a means of instinctive or unconscious expression

Word Origin for tachisme

C20: French, from tache stain
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012