'nervured' (via 'nervure') originates from French, specifically the word 'nervure', which ultimately derives from Latin 'nervus' where 'nervus' meant 'sinew' or 'nerve'.

'nervus' in Latin passed into Old and Middle French as 'nervure' meaning a nerve or riblike vein; English adopted 'nervure' (noun) and formed the adjectival/past-participle 'nervured' to describe things having such veins.

Initially it referred to 'sinew' or 'nerve' (literal bands); over time in scientific contexts it came to mean 'veinlike or riblike structures' (especially in wings and leaves), which is the modern sense.