Heb. hishalon i.e., "invention" (as in Eccl 7:29 ) contrivances indicating ingenuity. In 2 Chronicles 26:15 it refers to inventions for the purpose of propelling missiles from the walls of a town, such as stones (the Roman balista) and arrows (the catapulta).

Heb. mechi kobollo, i.e., the beating of that which is in front a battering-ram ( Ezekiel 26:9 ), the use of which was common among the Egyptians and the Assyrians. Such an engine is mentioned in the reign of David ( 2 Samuel 20:15 ).

These dictionary topics are from
M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition,
published by Thomas Nelson, 1897. Public Domain, copy freely.