'non-amphisbaenid' is formed in modern English by the negative prefix 'non-' (from Latin 'non', meaning 'not') attached to 'amphisbaenid' (a taxonomic term).

'amphisbaenid' comes from Neo-Latin 'Amphisbaenidae' (family name), ultimately from Greek 'amphisbaaina'/'amphisbaena' (a mythical two-headed serpent) formed from 'amphis-' meaning 'both' and a root related to 'bainein'/'bainein' (to go); the zoological sense was adopted in scientific Latin/English for worm lizards, and later the modern English formation 'non-' + 'amphisbaenid' produced 'non-amphisbaenid'.

Originally referring to a mythical 'both-headed' serpent, the stem was adopted in zoology to name a group of legless lizards (Amphisbaenia/Amphisbaenidae); adding 'non-' creates the straightforward negated meaning 'not an amphisbaenid'.