Source : Webster's Revised Unabridged Dictionary (1913)

Cola nut \Cola nut\, Cola seed \Cola seed\ . (Bot.)
   The bitter fruit of {Cola acuminata}, which is nearly as
   large as a chestnut, and furnishes a stimulant, which is used
   in medicine.

Source : WordNet®

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