释义 |
mountain ash noun 1. : any of various trees of the genus Sorbus: as a. : rowan tree 1 b. : american mountain ash c. : western mountain ash 2. : any of several Australian eucalypts (especially Eucalyptus sieberiana and E. regnans) with deeply furrowed bark suggesting that of old trees of the genus Fraxinus — see australian oak 3. : a low-growing Texas ash (Fraxinus texensis) having leaves with mostly five leaflets |