[a. obs. F. cascane.] (See quots.)
1696. Phillips, Cascans, in Fortification, Wells digg’d to clear the Mines from Water.
1704. J. Harris, Lex. Techn., Cascan … is a certain Hole or Hollow-place in form of a well, from whence a Gallery dug in like manner under Ground is convey’d, to give Air to the Enemies Mine.
1721–1800. in Bailey.
