from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Football An imaginary area as wide as the length of the football extending across the field between the lines of scrimmage, in which the presence of any player other than the center at the snap of the ball constitutes a violation of the rules.
- n. Sports The area of an ice hockey rink between the two bluelines that is neither an offensive nor a defensive zone.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. zone between the defensive line of scrimmage and the offensive line of scrimmage.
- n. zone on the playing surface between the attacking zone and the defending zone as delineated by the two blue lines.
Sorry, no etymologies found.
Finally the British admiralty came to an agreement with the French admiralty that there would be a five kilometre wide neutral zone between underwater fortifications in the English Channel, and in this way the exceptional friendliness existing between the two states was confirmed.