Lewis Short
imprĕcātĭo | inpr- (noun F.n) : (), , imprecor
* An invoking of evil, imprecation (postAug.): exsecraris illum et caput sanctum tibi dira imprecatione defigis,curse,Sen. Ben. 6, 35, 1; id. Ep. 94, 52: imprecationes nefariae,Amm. 29, 1, 25: dira,Plin. 5, 8, 8, § 45.
* In late Lat., in a good sense, a prayer: pontificis,Hier. Ep. 130, 2.
Charlton T. Lewis, Charles Short, A Latin Dictionary