'normosmia' originates from New Latin/modern medical coinage, formed from the combining form 'normo-' (from Latin 'norma', meaning 'rule' or 'standard') + Greek 'osmia' from 'osmē' (ὀσμή), meaning 'smell'.

'normosmia' was coined in modern medical/academic usage by combining the prefix 'normo-' with the Greek-derived element 'osmia'; it did not evolve through common Middle English but rather through technical New Latin formation into the current English medical term 'normosmia'.

Initially the parts meant 'standard/rule' and 'smell' separately; over time the coined term came to mean specifically 'having a normal sense of smell' in clinical contexts.