The Collaborative International Dictionary of English v.0.48:

Linoleum \Li*no"le*um\ (l[i^]*n[=o]"l[-e]*[u^]m), n. [L. linum
   flax + oleum oil.]
   1. Linseed oil brought to various degrees of hardness by some
      oxidizing process, as by exposure to heated air, or by
      treatment with chloride of sulphur. In this condition it
      is used for many of the purposes to which India rubber has
      been applied.
      [1913 Webster]

   2. A kind of floor cloth made by laying hardened linseed oil
      mixed with ground cork on a canvas backing.
      [1913 Webster]

WordNet (r) 3.0 (2006):

linoleum
    n 1: a floor covering [syn: linoleum, lino]