Amphisbaena
Pronunciation : Am`phis*b?"na
Part of Speech : n.
Etymology : [L., fr. Gr.
Definition : 1. A fabled serpent with a head at each end, moving either way. Milton.
2. (Zo?l.)
Defn: 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. See Illustration in Appendix.
Note: The Gordius aquaticus, or hairworm, has been called an amphisb?na; but it belongs among the worms.
Source : Webster's Unabridged Dictionary, 1913