twibill

/T W IH1 B AH0 L/
noun
  1. 1

    An axe with two cutting blades.

  2. 2

    A mattock.

  3. 3

    A double-bladed tool used in gate-type hurdle-making for cutting out mortices, with a flat chisel and a mortice chisel or hook, similar to the much larger French carpenter's tool, the besaiguรซ (or bisaiguรซ).

  4. 4

    A double-bladed halberd or battle-axe.

Source: https://en.wiktionary.org/wiki/twibill