tach·isme or tach·ism (tăshĭz′əm)
A French school of art originating in the 1950s and characterized by irregular dabs and splotches of color applied haphazardly to the canvas.
[French tachisme, from tache, stain, from Old French teche, mark, of Germanic origin; see deik- in the Appendix of Indo-European roots.]
tachiste, tachist n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.