fifth wheel
زبان مبدأ: انگلیسی
ترجمه به فارسی
- واژهنامه · Merriam-Webster Collegiate Dictionary fifth wheel Function: noun Date: circa 1874 1 a : a horizontal wheel or segment of a wheel that consists of two parts rotating on each other above the fore axle of a carriage and that forms support to prevent tipping b : a similar coupling between tractor and trailer of a semitrailer 2 : one that is superfluous, unnecessary, or burdensome