D defs.my
Entry 1 sense Webster, 1913

Estuation

· Es·tu·a·tion · IPA /ˌɛst͡ʃuˈeɪ̯.ʃən/
01 n. The act of estuating; commotion, as of a fluid; agitation.
  1. 1.
    The act of estuating; commotion, as of a fluid; agitation.
    “The estuations of joys and fears.” — W. Montagu.