Source : Webster's Revised Unabridged Dictionary (1913)

Pickax \Pick"ax`\, Pickaxe \Pick"axe`\, n. [A corruption of OE.
   pikois, pikeis, F. picois, fr. pic. See {Pick}, n.]
   A pick with a point at one end, a transverse edge or blade at
   the other, and a handle inserted at the middle; a hammer with
   a flattened end for driving wedges and a pointed end for
   piercing as it strikes. --Shak.

Source : WordNet®

pickax
     n : a heavy iron tool with a wooden handle and a curved head
         that is pointed on both ends; "they used picks and
         sledges to break the rocks" [syn: {pick}, {pickaxe}]