plācāmentum, i, n. [placo],
a means of pacifying or appeasing , a lenitive (postAug.): hoc veluti placamento terrae blandiuntur, Plin. 21, 7, 19, § 42.—In plur.: deŭm placamenta, Tac. A. 15, 44; id. H. 1, 63.
plācāmentum ī, n placo, a means of appeasing : deūm placamenta, Ta. ...
An Elementary Latin Dictionary