'selenium-sufficient' originates from the combination of 'selenium,' a chemical element, and 'sufficient,' meaning adequate or enough.

'Selenium' comes from the Greek word 'selene,' meaning 'moon,' and 'sufficient' from Latin 'sufficere,' meaning 'to provide' or 'to supply.'

Initially, 'selenium-sufficient' referred to having enough selenium for basic needs, and this meaning has remained consistent.