Definify.com

Webster 1913 Edition

Adj.

Same as

Adj.

[L. piacularis, from pio, to expiate.]

Expiatory; having power to atone.

Requiring expiation.

Criminal; atrociously bad.

[These words are little used.]

piaculous ‎(comparative more piaculous, superlative most piaculous)

Obsolete form of piacular.
- 1672, Sir Thomas Browne, Pseudodoxia Epidemica (6th edition, book 3, chapter 25)
  And so, as Cæsar reports, unto the ancient Britains it was piaculous to taste a Goose, which dish at present no table is without.