'anurous' originates from New Latin (scientific usage), from Greek elements 'an-' meaning 'without' and 'oura' meaning 'tail'.

'anurous' comes from New Latin 'anurus' (formed from Greek 'anouros'), which itself derives from Greek 'an-' + 'oura', and was adopted into English as an adjective in scientific contexts to mean 'tailless'.

Initially used in scientific/biological Latin to describe members of the order Anura (tailless amphibians) or the condition of lacking a tail; it has retained the specialized meaning 'without a tail' in modern usage.