'median-income' originates from the Latin word 'medianus,' meaning 'middle,' and the Old English word 'income,' meaning 'money received.'

'Medianus' transformed into the English word 'median,' and 'income' has remained largely unchanged from Old English to modern English.

Initially, 'median' meant 'middle,' and 'income' meant 'money received.' The combined term 'median-income' specifically refers to the middle point of income distribution.