(ˈ)pī|akyələ(r) adjective
Etymology: Latin piacularis, from piaculum + -aris -ar
1. : sacrificial , expiatory
required to make a piacular offering for their sins
2. : requiring expiation : sinful , heinous
piacular offense
• pi·ac·u·lar·ly adverb
• pi·ac·u·lar·ness noun -es