O gauge
Americannoun
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a model-railroad gauge of 1.25 inches (32 millimeters).
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Also called Q gauge. a model-railroad gauge of 1.1875 inches (30 millimeters).
Etymology
Origin of O gauge
First recorded in 1900–05
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A snow scene with O gauge railroad and trains for kids to run.
From Washington Post ● Mar. 12, 2010
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