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plācātĭo: ōnis, f. placo,I a pacifying, appeasing, propitiating: deorum immortalium, Cic. N. D. 3, 2, 5; id. Tusc. 4, 28, 60.
plācātĭō, ōnis, f. (placo), action d’apaiser, de fléchir : Cic. Nat. 3, 5 ; Tusc. 4, 60.