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The Collaborative International Dictionary
Arietation

Arietation \Ar`i*e*ta"tion\, n. [L. arietatio.]

  1. The act of butting like a ram; act of using a battering-ram. [Obs.]
    --Bacon.

  2. Act of striking or conflicting. [R.]
    --Glanvill. [1913 Webster] ||

Wiktionary
arietation

n. 1 (context obsolete English) The act of butting like a ram; the use of a battering ram. 2 (context obsolete English) The act of strike or conflicting.