Source : Webster's Revised Unabridged Dictionary (1913)

Kola \Ko"la\, Kola nut \Kola nut\ .
   Same as {Cola}, {Cola nut}.

Source : WordNet®

kola nut
     n 1: bitter brown seed containing caffein; source of cola extract
          [syn: {cola nut}]
     2: tree bearing large brown nuts containing e.g. caffeine;
        source of cola extract [syn: {kola}, {kola nut tree}, {goora
        nut}, {Cola acuminata}]