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- Created 2012-03-13
North American football
primarily played in the
. The predominant forms of gridiron football are
. Gridiron refers to the sport's characteristic
, which is marked with a series of parallel lines resembling a
"Gridiron" football developed in the late 19th century out of the older games related to the games now known as
. It is distinguished from other football codes by its use of helmets and shoulder pads, the
system of downs
line of scrimmage
, more specialist
, free substitution, platooning of different players for offense and defense, measurements in
s, a distinctive brown leather
in the shape of a
, and the ability to score points while not in possession of the ball by way of the
is credited with creating many of the rules that differentiate gridiron football from its older counterparts.
The international governing body for gridiron football is the
International Federation of American Football
(IFAF); although the organization uses the name "American football" and plays all of its international competitions under American rules, it uses a definition of the game that is broad enough that it includes Canadian football under its umbrella, and
(the governing body for Canadian football) is an IFAF member.
from Wikipedia (last updated: 20 May), licensed under
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