[1] : The Collaborative International Dictionary of English v.0.48

macadamia \macadamia\ n.
   1. any tree of the genus macadamia, especially macadamia
      ternifolia.

   syn: macadamia tree.
        wordnet 1.5

   2. a macadamia nut.
      pjc
see also:
macadamia macadamia ternifolia macadamia nut 

[2] : WordNet (r) 2.0

macadamia
     n : any tree of the genus macadamia syn: macadamia tree
see also:
macadamia tree 

Macadamia >> M Words
Macadamia, definition of term: Macadamia
macadamia_pag1.html

Macadamia Nut >> M Words
Macadamia Nut, definition of term: Macadamia Nut
macadamia+nut_pag1.html