Definition of macadamia
1 capitalized : a small genus of Australian evergreen trees (family Proteaceae) including one (M. ternifolia) that is widely cultivated in warm regions for its edible nut
2 plural -s a or macadamia tree : any tree of the genus Macadamia b : macadamia nut
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Origin and Etymology of macadamia
New Latin, from John Macadam †1865 Australian chemist born in Scotland + New Latin -ia
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