oak of Bashan
now rare
noun
A kind of oak mentioned in the Bible (Isaiah 2:13, Ezekiel 27:6, Zechariah 11:2) as found in the district of Bashan (in allusive references to its strength); the valonia oak, Quercus macrolepis (formerly Q. aegilops), identified with this tree.
Origin
Mid 17th century. Translating Hebrew 'allōnē habbāšān, 'allōnē ƀāšān (plural).