The Collaborative International Dictionary of English v.0.48:
Peculator \Pec"u*la`tor\, n. [L.] One who peculates. "Peculators of the public gold." --Cowper. [1913 Webster]WordNet (r) 3.0 (2006):
peculator n 1: someone who violates a trust by taking (money) for his own use [syn: embezzler, defalcator, peculator]