Source : Webster's Revised Unabridged Dictionary (1913)

Myrcia \Myr"ci*a\, n. [NL.] (Bot.)
   A large genus of tropical American trees and shrubs, nearly
   related to the true myrtles ({Myrtus}), from which they
   differ in having very few seeds in each berry.

Source : WordNet®

Myrcia
     n : a genus of tropical American trees and shrubs of the myrtle
         family [syn: {Myrciaria}, {genus Myrciaria}]