The Collaborative International Dictionary of English v.0.48:

Lascar \Las"car\, n. [Per. & Hind. lashkar an army, an inferior
   artillery man, a cooly, a native sailor.]
   A native sailor, employed in European vessels; also, a menial
   employed about arsenals, camps, camps, etc.; a camp follower.
   [East Indies]
   [1913 Webster]

WordNet (r) 3.0 (2006):

lascar
    n 1: an East Indian sailor
    2: a volcano in the Andes in Chile