Dictionary

thirty–thirty

noun thir·ty–thir·ty \ˌthər-tē-ˈthər-tē\

Definition of THIRTY-THIRTY

:  a rifle that fires a .30 caliber cartridge having a 30 grain powder charge —usually written .30–30

First Known Use of THIRTY-THIRTY

1929

Rhymes with THIRTY-THIRTY

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May 30, 2015
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