'dual-sided' originates from the combination of 'dual' and 'sided', where 'dual' comes from Latin 'dualis', meaning 'two', and 'sided' refers to having sides.

'Dual' changed from the Latin word 'dualis' and eventually became the modern English word 'dual'.

Initially, 'dual' meant 'two' or 'double', and this meaning has largely remained the same in modern usage.