'macrocosm' originates from Greek, specifically the word 'makros kosmos', where 'makros' meant 'large' and 'kosmos' meant 'world'.

'makros kosmos' transformed into the Latin word 'macrocosmus', and eventually became the modern English word 'macrocosm'.

Initially, it meant 'large world', but over time it evolved into its current meaning of 'the whole universe or a large complex structure'.