'ankylocheilia' originates from New Latin (medical), specifically from Greek 'ankylos' and 'cheilos', where 'ankylos' meant 'bent, crooked, or fused' and 'cheilos' meant 'lip'.

'ankylocheilia' was formed in New Latin by combining the Greek combining form 'ankylo-' and 'cheilia' (from 'cheilos'), and the term was later adopted into English medical usage as 'ankylocheilia'.

Initially it referred to the notion of a 'bent or crooked lip' from the Greek roots, but over time it evolved into the specific medical meaning 'adhesion or fusion of the lips'.