1. (noun) tree having wood similar to the alpine ash; tallest tree in Australia and tallest hardwood in the world

• eucalyptus regnans

2. (noun) low-growing ash of Texas

• fraxinus texensis

1. (noun) any of various trees of the genus Sorbus

• american mountain ash
• sorbus americana
• european mountain ash
• rowan
• rowan tree
• sorbus aucuparia
• service tree
• sorb apple
• sorb apple tree
• sorbus domestica
• sorbus sitchensis
• western mountain ash

1. (noun) any of various trees of the genus Sorbus

• angiospermous tree
• flowering tree

2. (noun) tree having wood similar to the alpine ash; tallest tree in Australia and tallest hardwood in the world

• eucalypt
• eucalyptus
• eucalyptus tree

3. (noun) low-growing ash of Texas

• ash
• ash tree

1. (noun) any of various trees of the genus Sorbus

• genus sorbus
• sorbus