Eagle Grip: In an eagle grip, a gymnasts hands are turned 180 degrees outward from a regular over grip. The hands and thumbs are turned out in the grip. This position requires a high degree of shoulder flexibility to swing comfortably and maintain a firm grip during the swing.  Also called an L Grip. 

Eccentric Muscle Contraction: An eccentric contraction is when a contracting muscle lengthens. An example is lowering down by straightening the arms from a chin-up.

Elbow Stand: An inverted pose in which the performer balances on the forearms on the floor.  Kind of like a handstand on the forearms.

Element: A single move that has a recognized way of performance and technical value. To be named after a gymnast, he or she must first submit the element to the FIG and then successfully perform the element in a FIG sanctioned international competition, such as the World Championships or Olympic Games.

Endo: A bar and uneven bar skill done by performing a forward straddle circle, usually to a handstand.  Also called an Endo Shoot. 

Events: The 4 women's events in gymnastics are Floor, Uneven Bars, Beam and Vault. The 6 men’s events are Floor, Pommel Horse, Rings, Vault, Parallel Bars and High Bar.

Execution: The amplitude, form, style and technique used to complete the skills in in the performance of a routine. Bent knees and flexed toes are examples of poor execution. 

Extension: A term commonly used by gymnasts and coaches to refer to the height of the leg when it is raised into the air during a dance skill. 

Extension/Flexion: The act of stretching or straightening out a flexed limb. Extension of a joint is moving toward its most straight position. Flexion is the bending of a joint.  Opposing muscles move each joint in the body toward extension or flexion.
 

Gymnastics Dictionary