'non-antennal' originates from English prefix 'non-' (from Latin 'non', meaning 'not') combined with 'antennal', which is formed from 'antenna' + adjectival suffix '-al'.

'antennal' comes from 'antenna' (borrowed into English in the 17th century from Latin 'antenna' meaning 'yard-arm' and later used in biology for sensory appendages), with '-al' (from Latin '-alis') forming the adjective; 'non-' was simply prefixed to create 'non-antennal'.

Initially 'antenna' referred to a mast or yardarm; in biology it came to mean the sensory appendage. 'Non-antennal' has developed straightforwardly to mean 'not antennal' or 'lacking antennae'.