The Collaborative International Dictionary of English v.0.48:

Madia \Ma"di*a\, n. [NL., fr. Sp. madi, fr. Chilian madi, the
   native name.] (Bot.)
   A genus of composite plants, of which one species (Madia
   sativa) is cultivated for the oil yielded from its seeds by
   pressure. This oil is sometimes used instead of olive oil for
   the table.

   Syn: melosa, Chile tarweed, madia oil plant, Madia sativa.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

madia oil \madia oil\ n.
   The vegetable oil obtained from the Madia sativa. See
   Madia and madia oil plant.
   [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

madia oil plant \madia oil plant\ n.
   The Madia sativa, a South American herb with sticky
   glandular foliage, the source of madia oil. See Madia.
   [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

melosa \melosa\ n.
   A South American herb (Madia sativa) with sticky glandular
   foliage; it is a source of madia oil.

   Syn: Chile tarweed, madia oil plant, Madia sativa.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Madia sativa
    n 1: South American herb with sticky glandular foliage; source
         of madia oil [syn: melosa, Chile tarweed, madia oil
         plant, Madia sativa]