Heb. nechoth, identified with the Arabic naka'at, the gum tragacanth, obtained from the astralagus, of which there are about twenty species found in Palestine. The tragacanth of commerce is obtained from the A. tragacantha. "The gum exudes plentifully under the heat of the sun on the leaves, thorns, and exteremity of the twigs."
Easton's Bible Dictionary. M.G. Easton. 1897.