\Myr*ta"ceous\, a. [L. myrtaceus.] (Bot.)
Of, pertaining to, or resembling, a large and important
natural order of trees and shrubs ({Myrtace[ae]}), of which
the myrtle is the type. It includes the genera {Eucalyptus},
{Pimenta}, {Lechythis}, and about seventy more.