Source : Webster's Revised Unabridged Dictionary (1913)

Areca \A*re"ca\, n. [Canarese adiki: cf. Pg. & Sp. areca.]
   (Bot.)
   A genus of palms, one species of which produces the areca
   nut, or betel nut, which is chewed in India with the leaf of
   the {Piper Betle} and lime.

Source : WordNet®

areca
     n : any of several tall tropical palms native to southeastern
         Asia having egg-shaped nuts