'non-eurypterid' originates from the English prefix 'non-' (from Latin 'non'), where 'non' meant 'not', combined with the taxonomic noun 'eurypterid'.

'eurypterid' changed from New Latin 'Eurypterida' (coined from Ancient Greek 'eurys' meaning 'broad' and 'pteron' meaning 'wing') and became the English noun 'eurypterid'; the combining prefix 'non-' was later attached in scientific usage to form 'non-eurypterid'.

Initially formed to mean 'not an eurypterid' for clarity in taxonomic or descriptive contexts; this sense has been retained with little change.