What is Exoine?

Legal Definition
French law. An act or instrument in writing, which contains the reasons why a party in a civil suit, or a person accused, who has been summoned, agreeably to the requisitions of a decree, does not appear. Poth. Proced. Crim. s. 3, art. 3. Vide Essoin.
-- Bouviers Law Dictionary
Legal Definition
In French law. An act or instrument in writing which contains the reasons why a party in a civil suit or a person accused, who has been summoned, agreeably to the requisitions of a decree, does not appear. Poth. Proc. Crim. ยง 3, art 3. The same as "Essoin," (q. v.)
-- Black's Law Dictionary