nounpl. -·re′tums or -·re′ta
a place where many kinds of trees and shrubs are grown for exhibition or study
Origin of arboretumClassical Latin from arbor, tree
nounpl. ar·bo·re·tums, or ar·bo·re·ta
A place where an extensive variety of woody plants are cultivated for scientific, educational, and ornamental purposes.
Origin of arboretumLatin arborētum a place grown with trees from arbor tree
(plural arboretums or arboreta)