1. A fabled serpent with a head at each end, moving either way.
2. (Science: zoology) 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.
The gordius aquaticus, or hairworm, has been called an amphisbaena; but it belongs among the worms.
Origin: L, fr. Gr.; on both ends _ to go.