Weight lifting
The Crucifix is a grappling move that is designed to immobilize the opponent's head and neck. This is a commonly used move in mixed martial arts matches.
Trampolining
Crucifix
Rood
the crucifix
I don't think there is a special name for it, so I suggest you just call it "a large crucifix".
it's called a crucifix
The Holy Crucifix
A 'T' shape could be called a cross, and in a religious manner, a crucifix.
The crucifix position (usually referred to simply as the crucifix) is found in ground grappling and involves being perpendicularly behind the opponent your chest against back, and controlling the opponents arms. One of the opponents arms is controlled using the legs, and the other using the arms, hence effectively putting the opponent in a position resembling a crucifix. It is often used to refer to any position that causes the opponents arms to be straight out. There are some good photos on the web that show the move.
A crucifix is a representation of Jesus on the cross. The crucifix is used mainly in the Roman Catholic church.