o·hi·a le·hu·a (ō-hē'ə lā-hōō'ə) n. Any of several evergreen shrubs or trees of the genus Metrosideros of Hawaii and other Pacific islands, especially M. collina or M. polymorpha, having showy red flowers.
[Hawaiian 'ōhi'a lehua : 'ōhi'a, ohia lehua + lehua, flower of the ohia lehua.]