According to Wikipedia, a football field is called a gridiron because the markings on the field resemble that type of grill that can be used to cook food over a fire. Besides the yard markings every five yards on the field; during the early days following the introduction of the forward pass, longitudinal lines were added so that the field became a series of rectangles or squares. The football fathers of that time thought the forward pass was just a little too much of a good thing and so in an effort to limit the impact you could only pass the ball from your square to an ajoining one. The additional lines truly made the field appear to be a gridiron
A gridiron has parallel bars or beams. The American football field has parallel lines on the field.
the football field.
The field of play in American football.
A fieldgoal is a gridiron football term.
The word is simply "field." It can also be described as a "gridiron" due to its marking into segments by yard lines. An American football field can also be called a football pitch. In other parts of the world football is called soccer, thus a football pitch in a place like England would be a soccer field.
perhaps, if it is a shortened version of gridiron.
Kind of. If you were to look at an American football field from above, the way the chalk lines are laid out for the yard lines and end zones would make it look something like a gridiron.