The Collaborative International Dictionary of English v.0.48:

Lard \Lard\ (l[aum]rd), n. [F., bacon, pig's fat, L. lardum,
   laridum; cf. Gr. (?) fattened, fat.]
   1. Bacon; the flesh of swine. [Obs.] --Dryden.
      [1913 Webster]

   2. The fat of swine, esp. the internal fat of the abdomen;
      also, this fat melted and strained.
      [1913 Webster]

   Lard oil, an illuminating and lubricating oil expressed
      from lard.

   Leaf lard, the internal fat of the hog, separated in leaves
      or masses from the kidneys, etc.; also, the same melted.
      [1913 Webster]

WordNet (r) 3.0 (2006):

lard oil
    n 1: oil consisting chiefly of olein that is expressed from lard
         and used especially as a lubricant, cutting oil or
         illuminant