Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

pĭācŭlāris, e, adj. [piaculum], atoning, expiatory, piacular (rare; not in Cic.): hostia, Varr. L. L. 6, § 30 Müll.: sacrificia, sinofferings, Liv. 1, 26; also absol.: ut piacularia Junoni fierent, id. 42, 3: piacularia auspicia appellabant, quae sacrificantibus tristia portendebant, cum aut hostia ab arā effugisset, aut percussa mugitum dedisset, aut in aliam partem corporis quam oporteret cecidisset, Paul. ex Fest. p. 244 Müll.: piacularis porta appellatur propter aliqua piacula, quae ibidem fiebant, Fest. p. 212 Müll.; Plin. Ep. 3, 9, 9.
Comic., transf., Plaut. Ep. 1, 2, 36.
Adv.: pĭācŭlārĭ-ter, sinfully: negare, Tert. Pud. 22 (al. peculiariter).

pĭācŭlo, āre, v. a. [piaculum], to appease or propitiate with an offering: Mars Pater, te hisce suovetaurilibus piaculo, Cato, R. R. 141, 4.