the.com/amphisbaenian

means A worm-like reptile (and, in legend, a serpent) with blunt heads at both ends of its body, equally capable of moving forward or backward.

from From Greek 'amphisbaina,' literally 'going both ways' — 'amphi' (both/around) plus 'bainein' (to go, to walk). The name first belonged to a mythical serpent, described by ancient writers like Pliny, said to have a head at each end so it could bite from either side. Naturalists later borrowed the word for real burrowing reptiles whose blunt tails mimic their heads, keeping the two-headed myth alive in zoological Latin.