
Lines that divide the rink into three zones: attacking, defending and neutral (center) zone.
Found on
http://www.allstaractivities.com/sports/hockey/Hockey-terminology.htm

The ice surface is divided into sections by two blue lines. The blue lines are 60 feet from the goal line (the goal sits on the goal line.) The blue lines are 12 inches wide and extend from board to board. Blue lines are not used on in-line rinks.
Found on
http://www.encyclo.co.uk/local/21159

Two blue, 12-inch wide lines running parallel across the ice, each 60 feet from the goal; they divid
Found on
http://www.encyclo.co.uk/local/22383
[Ice Hockey] two blue, 12-inch wide lines running parallel across the ice, each 60 feet from the goal; they divide the rink into three zones called the attacking, defending and neutral (or center) zones; defending blue line is the line closer to a player`s own net; attacking blue line is the one farther from his net; used in...
Found on
http://www.firstbasesports.com/hockey_glossary.html
No exact match found.