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Webster 1913 Edition

Noun.

[L.

aestuatio

The act of estuating; commotion, as of a fluid; agitation.

The

estuations

of joys and fears.

W. Montagu.

Noun.

A boiling; agitation; commotion of a fluid.

estuation ‎(plural estuations)

The act of estuating; commotion, as of a fluid; agitation.
The estuations of joys and fears. — W. Montagu.