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

macadamia nut \macadamia nut\ n.
   the hard-shelled nut of the macadamia ternifolia, or the
   delicious edible nut without its shell; large quantities are
   produced in hawaii and sold commercially.
   pjc
see also:
macadamia ternifolia 

[2] : WordNet (r) 2.0

macadamia nut
     n 1: small australian tree with racemes of pink flowers; widely
          cultivated especially in hawaii for its sweet edible
          nuts syn: macadamia nut tree, macadamia ternifolia
     2: nutlike seed with sweet and crisp white meat
see also:
macadamia nut tree macadamia ternifolia 

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