Either of two Australian trees of the genus Macadamia (family Proteaceae), M. integrifolia and M. tetraphylla, valued for their edible nuts; a nut from either of these trees.
Origin
Late 19th century.
Definition of Queensland nut in US English:
Queensland nut
noun
Australian
Either of two Australian trees of the genus Macadamia (family Proteaceae), M. integrifolia and M. tetraphylla, valued for their edible nuts; a nut from either of these trees.