'omnivorism' originates from Latin, specifically the word 'omnivorus,' where 'omni-' meant 'all' and 'vorare' meant 'to devour.'

'omnivorus' transformed into the English word 'omnivore,' and eventually became the modern English word 'omnivorism.'

Initially, it meant 'eating all kinds of food,' and this meaning has largely remained the same in modern usage.