Today's word is also from Sex Wars by Marge Piercy; found on page 309. Not surprisingly it has a similar meaning to the last word of the day: termagant.
Virago is a noun meaning a quarrelsome, shrewish woman; scold. It also has an archaic definition: a strong, manlike woman; amazon. It comes from Latin, where it meant a manlike female.
My sentence: "God save us from viragoes," said the male chauvinist pig.