felo-de-se

from WordNet (r) 3.0 (2006)

felo-de-se
    n 1: a person who kills himself intentionally [syn: {suicide},
         {felo-de-se}]
    2: an act of deliberate self destruction

from The Collaborative International Dictionary of English v.0.48

Felo-de-se \Fe"lo-de-se`\, n.; pl. {Felos-de-se}. [LL. felo, E.
   felon + de of, concerning + se self.] (Law)
   One who deliberately puts an end to his own existence, or
   loses his life while engaged in the commission of an unlawful
   or malicious act; a suicide. --Burrill.
   [1913 Webster]