A fabled serpent with a head at each end, moving either way.
2.
(Zool.) A genus of harmless lizards, serpentlike in form, without legs, and with both ends so much alike that they appear to have a head at each, and ability to move either way. Note: The Gordius aquaticus, or hairworm, has been called an amphisbaena; but it belongs among the worms.
...Amphisbaena, as soon as I received your commands, I made diligent inquiry: he assures me y't it had really two heads, one at each end, two mouths, two ... — Atlantic Monthly, Volume 3, Issue 17, March, 1859 • Various
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