'Amarantaceae' originates from the Greek word 'amarantos,' meaning 'unfading,' referring to the long-lasting flowers of the plants in this family.

'Amarantaceae' was derived from the Latin 'Amarantus,' which was used to describe the amaranth plant, and eventually became the modern English term 'Amarantaceae.'

Initially, it referred to the 'unfading' nature of the flowers, and this meaning has largely remained the same in modern usage.