pĭāmentum, i, n. [pio],
I a means of expiation , an atoning sacrifice (perh. not anteAug.): terrae, Plin. 25, 9, 59, § 107; 25, 4, 11, § 30; cf.: piamenta, quibus utitur (in) expiando, Fest. s. v. piatrix, p. 213 Müll.; p. 238 ib.—
II Trop., Sen. Cons. ad Helv. 16; Plin. 37, 1, 2, § 3.