horizontal bar

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A gymnastics apparatus consisting of a single bar mounted approximately eight feet above the ground and used for swinging maneuvers. Also called high bar.

Wiktionary

1. n. gymnastics A horizontally-aligned bar used in gymnastics, upon which acts of swinging are performed.
2. n. gymnastics A gymnastics event using the horizontal bar.
3. n. typography The dash symbol (―) (used to introduce quoted text)

WordNet 3.0

1. n. gymnastic apparatus consisting of a bar supported in a horizontal position by uprights at both ends