Tertium quids

The tertium quids (sometimes shortened to quids) were various factions of the Jeffersonian Republican Party in the United States during the early 1800s, which gradually faded into political obscurity by the 1820s.

In Latin, tertium quid means "a third something". Initially, quid was a disparaging term that referred to cross-party coalitions of Federalists and moderate Republicans, such as those who supported the election of Thomas McKean as governor of Pennsylvania in 1805. However, by the 1810s, the term would more famously be used to refer to the radical faction of the Republican Party. The group, which was also called the Old Republicans, was more strongly opposed to the Federalist Party's policies than was the emerging moderate leadership of the Republican Party.