Easton's Bible Dictionary (1897)
(Heb. o’ren, “tremulous”), mentioned only Isa. 44:14 (R.V., “fir tree”). It is rendered “pine tree” both in the LXX. and Vulgate versions. There is a tree called by the Arabs aran, found still in the valleys of Arabia Petraea, whose leaf resembles that of the mountain ash. This may be the tree meant. Our ash tree is not known in Syria.
Smith's Bible Dictionary (1863)
(Heb. oren), only in (Isaiah 44:14) As the true ash is not a native of Palestine, some understand this to be a species of pine tree. Perhaps the larch (Laryx europaea) may be intended.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
ASH. Isa 44:14. Mentioned only once. The true ash is not a native of Palestine. This tree, the wood of which was wrought into the images of idolatry, is believed to be a pine.