'aneurin' originates from 'chemical nomenclature', specifically from the Greek word 'neur-' meaning 'nerve', with the prefix 'a-' and the suffix '-in' used for chemicals.

'aneurin' was coined in the early 20th century as a name for vitamin B1, reflecting its importance in nerve function, and eventually became a synonym for 'thiamine'.

Initially, it referred specifically to vitamin B1, and this meaning has remained unchanged.