'Cola nut' definitions:

Definition of 'cola nut'

(from WordNet)
noun
Bitter brown seed containing caffein; source of cola extract [syn: kola nut, cola nut]

Definition of 'Cola nut'

From: GCIDE
  • 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. [Webster 1913 Suppl.]