In the first days of football when a ball carrier crossed the goal line he would touch the ball to the ground. The touching of the ball to the ground for the score was called a "TOUCHDOWN".
This rule still applies in Rugby, where a player doesn't score unless he touches the ball to the ground.
Paydirt
I've never heard that term, but I would assume it means a touchdown scored from a play that originated at the line of scrimmage, as opposed to a touchdown scored on a kickoff return.
football is the child of rugby. When you score in rugby you would have to touch the ball down to the ground, hence the word touchdown.
when a player makes a touchdown from the 30 line (3=triangle)
An extra point is a football term. It is the field goal made after a team has scored a touchdown.
Touchdown is a noun.
Yes you can kick a touchdown. By kicking an onside kick recover it and return it for a touchdown.
yes
point after touchdown point after touchdown
No unless the ball lands in the touchdown
yes
is there a way to have a "best" touchdown