\Row"an tree`\ [Cf. Sw. r["o]nn, Dan. r["o]nne, Icel.
reynir, and L. ornus.] (Bot.)
A european tree ({Pyrus aucuparia}) related to the apple, but
with pinnate leaves and flat corymbs of small white flowers
followed by little bright red berries. Called also {roan
tree}, and {mountain ash}. The name is also applied to two
American trees of similar habit ({Pyrus Americana}, and {P.
sambucifolia}).