The Collaborative International Dictionary of English v.0.48:
Defalcator \Def"al*ca`tor\, n. A defaulter or embezzler. [Modern] [1913 Webster]WordNet (r) 3.0 (2006):
defalcator n 1: someone who violates a trust by taking (money) for his own use [syn: embezzler, defalcator, peculator]