D defs.my
Entry 1 sense Webster, 1913

Tumultuation

/(tū̇*mŭl`tū̇*ā"shŭn)/ · Tu·mul·tu·a·tion · IPA
01 n. Irregular or disorderly movement; commotion; as, the tumultuation of the parts of a fluid.
  1. 1.
    Irregular or disorderly movement; commotion; as, the tumultuation of the parts of a fluid.[Obs.]