willow oak

noun
an oak, Quercus phellos, of the southwestern U.S., having entire, narrow leaves, yielding a hard, heavy wood used in the construction of buildings.

Origin:
1700–10, Americanism

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Britannica
Encyclopedia

willow oak

any of several species of North American ornamental and timber trees belonging to the red oak group of the genus Quercus, in the beech family (Fagaceae), which have willowlike leaves.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Willow oak is long lived and fast growing, and it is widely planted as a landscape tree.
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