plācāmen, ĭnis, n. [placo],
a means of pacifying or appeasing , a lenitive : caelestis irae placamina, Liv. 7, 2, 3: duc praedicta sacris duro placamina Diti, Sil. 13, 415; cf. placamentum.
plācāmen inis, n placo, a means of conciliation : caelestis irae placamina, L. ...
An Elementary Latin Dictionary