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: a long, white nut that grows on a South American tree
Full Definition of BRAZIL NUT
: a tall South American tree (Bertholletia excelsa of the family Lecythidaceae) that bears large globular capsules each containing several closely packed roughly triangular oily edible nuts; also: its nut
Edible seed of a large South American tree, Bertholletia excelsa (family Lecythidaceae), and one of the major commercially traded nuts in the world. The hard-walled fruit, resembling a large coconut, contains 8–24 nuts (seeds) arranged in it like sections of an orange. Each nut has a very hard shell and is three-sided in shape. Brazil nuts are high in fat and protein and taste somewhat like almond or coconut. The tree grows wild in stands in the Amazon River basin, reaching heights of 150 ft (45 m) or more.