Source : Webster's Revised Unabridged Dictionary (1913)

Brazil nut \Bra*zil" nut`\ (Bot.)
   An oily, three-sided nut, the seed of the {Bertholletia
   excelsa}; the cream nut.

   Note: From eighteen to twenty-four of the seed or ``nuts''
         grow in a hard and nearly globular shell.

Source : WordNet®

brazil nut
     n 1: tall South American tree bearing brazil nuts [syn: {brazil-nut
          tree}, {Bertholletia excelsa}]
     2: three-sided tropical American nut with white oily meat and
        hard brown shell [syn: {brazil}]