Source : Webster's Revised Unabridged Dictionary (1913)

Araucaria \Ar`au*ca"ri*a\, n. [Araucania, a territory south of
   Chili.] (Bot.)
   A genus of tall conifers of the pine family. The species are
   confined mostly to South America and Australia. The wood
   cells differ from those of other in having the dots in their
   lateral surfaces in two or three rows, and the dots of
   contiguous rows alternating. The seeds are edible.

Source : WordNet®

araucaria
     n : any of several tall South American or Australian trees with
         large cones and edible seeds