Obs. [ad. F. cul breech, with the frequent interchange of oi and Fr. u. Cf. COIL v.4]

1

  1.  The breech of a gun.

2

1672.  W. P., Compl. Gunner, I. iv. 5. All the metal behind the touch-hole [is called] the Breach or Coyl.

3

1706.  Phillips, Coil … also the breach of a great Gun.

4

  2.  In the combination LEVEL-COIL (F. lever-le-cul), ‘hitch-buttock.’

5