Definition of "Cocytus"

Cocytus

proper noun
1. A river of the underworld in Greek mythology.
  Quotations
  By the Stigiall flode, / And the stremes wode / Of Cochitos bottumles well; […]
  1523, John Skelton, A ryght delectable tratyse upon a goodly Garlande or Chapelet of Laurell; republished in John Scattergood, editor, John Skelton: The Complete English Poems, 1983, page 349, lines 1327–1329
  All theſe Cocytus bounds vvith ſqualid Reeds, / VVith Muddy Ditches, and vvith deadly VVeeds: […]
  1697, Virgil, “The Fourth Book of the Georgics”, in John Dryden, transl., The Works of Virgil: Containing His Pastorals, Georgics, and Æneis. […], London: […] Jacob Tonson, […], page 143, lines 686–687