Brazil nut

  1. a gigantic (30-45 m or 100-150 ft) South American tree (Bertholletia excelsa) of the lecythis family, which bears hard-shelled, triangular, oily, edible seeds that grow in large, round, hard-shelled fruits
  2. this seed

See Brazil nut in American Heritage Dictionary 4

noun
  1. A tropical South American evergreen tree (Bertholletia excelsa) having globose, woody fruit and edible, dark brown, three-sided seeds.
  2. The seed of this tree.

Origin:

Origin: After Brazil

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