Source : Webster's Revised Unabridged Dictionary (1913)

Queensland nut \Queens"land nut`\ (Bot.)
   The nut of an Australian tree ({Macadamia ternifolia}). It is
   about an inch in diameter, and contains a single round edible
   seed, or sometimes two hemispherical seeds. So called from
   Queensland in Australia.

Source : WordNet®

Queensland nut
     n : bushy tree with pink to purple flowers [syn: {Macadamia
         tetraphylla}]