pickaxe(n = noun.artifact) pick, pickax - 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"
is a kind of edge tool
has particulars: mattock

   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. [1913 Webster]

pickaxe, n. & v. (US pickax)
--n. = PICK(2) n. 1.
--v.
1 tr. break (the ground etc.) with a pickaxe.
2 intr. work with a pickaxe.

Etymology:
ME pikois f. OF picois, rel. to PIKE(2): assim. to AXE