The Collaborative International Dictionary of English v.0.48:

Larcenous \Lar"ce*nous\, a. [Cf. OE. larrecinos. See Larceny.]
   Having the character of larceny; as, a larcenous act;
   committing larceny. "The larcenous and burglarious world."
   --Sydney Smith. -- Lar"ce*nous*ly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

larcenous
    n 1: having a disposition to steal [syn: thievishness,
         larcenous]