Perduellio
Defined in 3 dictionaries — Ballentine's (1916), Black's (1910), Kinney (1893)
Ballentine's Law Dictionary
James A. Ballentine · 1916
(Civil Law) Treason.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Lab In Roman law-Hostility or enmity towards the Roman republic; traitorous conduct on the part of a citizen, subversive of the authority of the laws or tending to overthrow the government. Calvin; Vicat.
A Law Dictionary and Glossary
George C. Kinney · 1893
I.
In the civil law. Treason; hostility against the state or prince; an attempt against the state, the prince or his ministers.