'ascarid' originates from New Latin, specifically the word 'Ascaris', ultimately from Greek 'askaris' where 'askaris' meant 'intestinal worm'.

'ascarid' changed from New Latin 'Ascaris' (from Greek 'askaris') through Medieval/Modern scientific Latin usage and eventually became the modern English word 'ascarid'.

Initially it meant 'intestinal worm' (the original Greek sense), but over time it came to refer more specifically to 'a parasitic roundworm of the family Ascarididae' in biological and medical usage.