Talk:Artillery Plasma Cannon/@comment-98.238.197.237-20140703215007/@comment-11090687-20140703222921

A Fissure is a long, narrow opening or line of breakage made by cracking or splitting, esp. in rock or earth or a deep furrow, elongated cleft, or tear in various parts of the body. This units Plasma Cannon, a cannon that fires plasma (one of the four fundamental states of matter), is apparently so strong that it creates fissures in stuff.

Simply said, the name is implying it's a pretty strong attack.

Note: do not just google for examples of anatomical fissures, you'll be seriously disappointed.