'nosocomial' originates from Late Latin, specifically the word 'nosocomium,' where 'nosos' meant 'disease' and 'komeion' meant 'to take care of.'

'nosocomium' transformed into the Medieval Latin 'nosocomialis,' and eventually became the modern English word 'nosocomial.'

Initially, it meant 'of or relating to a hospital,' but over time it evolved into its current meaning of 'acquired in a hospital, especially referring to infections.'