Doubleheader may refer to:

• Doubleheader (baseball) - Two baseball games played between the same two teams on the same day.
• Doubleheader (television) - An all-inclusive sports broadcast of two games back-to-back.
• A fish of the Wrasse family Coris bulbifrons.

The original usage of "doubleheader" is attributed to the 1900s railway industry to refer to two locomotives pulling a particularly long and heavy train (cit. Railroad Commission of Texas, http://www.lib.utexas.edu/taro/tslac/10226/tsl-10226.html)

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