|Easton's Bible Dictionary|
(1.) Hebrews ma'eder, an instrument for dressing or pruning a vineyard (Isaiah 7:25); a weeding-hoe.
(2.) Hebrews mahareshah (1 Samuel 13:1), perhaps the ploughshare or coulter.
(3.) Hebrews herebh, marg. of text (2 Chronicles 34:6). Authorized Version, "with their mattocks," marg. "mauls." The Revised Version renders "in their ruins," marg. "with their axes." The Hebrew text is probably corrupt.
Noah Webster's Dictionary
(n.) An implement for digging and grubbing. The head has two long steel blades, one like an adz and the other like a narrow ax or the point of a pickax.
Int. Standard Bible Encyclopedia
mat'-ok: The translation of 3 Hebrew words:
(1) machereshah, probably "a pick-axe" (1 Samuel 13:20, 21; compare 1 Samuel 13:21 margin);
(2) cherebh, "sword," "ax," "tool" (2 Chronicles 34:6 the King James Version, "with their mattocks," the King James Version margin "mauls," the Revised Version (British and American) "in their ruins," the Revised Version margin "with their axes");
(3) ma`-der, "a hoe," "rake," "chopping instrument" (Isaiah 7:25). Vines were usually grown on terraces on the hills of Palestine, and then the mattock was in constant use. The usual mattock is a pick with one end broad, the other pointed.
Mattock (2 Occurrences)
1 Samuel 13:20 but all the Israelites went down to the Philistines, to sharpen every man his plowshare, mattock, axe, and sickle; (WEB KJV JPS ASV WBS YLT NAS RSV NIV)
Isaiah 7:25 And on all hills that shall be digged with the mattock, there shall not come thither the fear of briers and thorns: but it shall be for the sending forth of oxen, and for the treading of lesser cattle. (KJV JPS ASV WBS YLT)