Rail: A horizontal rod that serves as a part of a gymnastics apparatus for gymnasts as they perform exercises.  They are found on uneven bars, high bars and parallel bars. A rail can also be called a Bar.

Ray: An uneven bar skill named after U.S. gymnast Elise Ray. The skill is performed facing inward and is a stalder backward with release and counter movement forward to catch the high bar.  The skill has been rated as a “C” level skill by the F.I.G. and its F.I.G. number is 6.305.

Ray: An uneven bar skill named after U.S. gymnast Elise Ray. The skill is performed from a handstand on the high bar to a pike sole circle backward into a backward counter straddle-reverse hecht over over the high bar and a recatch.  The skill has been rated as a “D” level skill by the F.I.G. and its F.I.G. number is 7.411.

Ray: An double twisting double layout uneven bar dismount named after U.S. gymnast Elise Ray. The skill is performed facing inward and is a stalder backward with release and counter movement forward to catch the high bar.  The skill has been rated as a “Super E” level skill by the F.I.G. and its F.I.G. number is 8.605.

Re-grasp: On uneven bars and high bar, the act of grabbing the bar again after releasing from it. 

Release: On uneven bars and high bar, to let go of the bar in order to perform another gymnastics move before grasping it again. There are many bar release moves, including somersault and twisting moves. In general, they belong to the very difficult elements. 

Relevé: In ballet and gymnastics to rise or lift onto the ball of the foot. 

Rep: Rep is shortened version of repetition. When doing an weightlifting or gymnastics exercise, a rep is one cycle of the action or motion.

Reverse Turn: In ballet and gymnastics, a turn in the direction of the supporting leg; also known as an "inward turn". 

Rhythmic Gymnastics: Officially called Rhythmic Sportive Gymnastics (RSG). An Olympic sport for either one woman or 5 women in group competition consisting of a floor exercise dance with leaps, turns, balance elements and flexibility moves while moving and tossing handheld apparatus: a ball, a rope, a hoop, two clubs, or a ribbon.  Significant tumbling is not allowed.  Rhythmic gymnasts are known for their extreme flexibility.

Rip: In gymnastics, a rip occurs is when a gymnast works so hard on the bars or rings that they tear off a flap of skin from their hand.  The injury is like a blister that breaks open. 

Rotation: This is the name for the circular motion around an axis of the body. In gymnastics there are salto rotations and twisting rotations.

Roth: A pommel horse skill named after U.S. gymnast Bill Roth. The skill is performed from a cross support, rearways, reverse Stockli, wendeswing forward to reverse Stockli to cross support forward on other end, without touching pommels.  The skill has been rated as a “C” level skill by the F.I.G. 

Round-off: A floor or beam skill similar to a cartwheel, but with both feet landing at the same time.  It is almost always the beginning skill for all back tumbling passes. 

Routine: In gymnastics, a routine is combination of skill elements on one apparatus or event. The number and difficulty of skills depends on the competition format, and skill level of the competitors. 

Rudolph / Rudy: A front layout somersault with 1½ twists.

Randolph: A front somersault (usually done in layout) with 2½  twists. Done in tumbling p-asses on floor exercies or as a beam dismount.  Also known as a Randy. 
 

Gymnastics Dictionary