crossbar

Short definition from Wiktionary

Noun

1. 1
   Any transverse bar or piece, such as a bar across a door, or the iron bar or stock which passes through the shank of an anchor.
2. 2
   The top of the goal structure.
3. 3
   The top tube of a bicycle frame.

Verb

1. 1
   To mark with a pattern of transverse bars.