Misericordia

Mis`e*ri*cor"di*a\, n. [L., mercy, compassion; miser wretched + cor, cordis, heart.]
1.
(O. Law) An amercement. --Burrill.
 
2.
(Anc. Armor.) A thin-bladed dagger; so called, in the Middle Ages, because used to give the death wound or "mercy" stroke to a fallen adversary.
 
3.
(Eccl.) An indulgence as to food or dress granted to a member of a religious order. --Shipley.