The Collaborative International Dictionary of English v.0.48:

Termagant \Ter"ma*gant\, a.
   Tumultuous; turbulent; boisterous; furious; quarrelsome;
   scolding. -- Ter"ma*gant*ly, adv.
   [1913 Webster]

         A termagant, imperious, prodigal, profligate wench.
                                                  --Arbuthnot.
   [1913 Webster]