Entry 1 sense Webster, 1913 Brazil nut /(brȧ*zĭl" nŭt`)/ · Bra·zil· nut · IPA /bɹəˈzɪl nʌt/ 01 An oily, three-sided nut, the seed of the Bertholletia excelsa; the cream nut. 1. An oily, three-sided nut, the seed of the Bertholletia excelsa; the cream nut.(Bot.)