The Collaborative International Dictionary of English v.0.48:

Myrtaceae \Myrtaceae\ prop. n.
   A natural family of trees and shrubs yielding fragrant oils,
   including the myrtles, eucalyptus, clove, allspice, and
   guava; the myrtle family.

   Syn: family Myrtaceae, myrtle family.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Myrtaceae
    n 1: trees and shrubs yielding a fragrant oil [syn: Myrtaceae,
         family Myrtaceae, myrtle family]