'peer-reviewed' originates from the combination of 'peer' and 'review,' where 'peer' refers to an equal in status or ability, and 'review' means to evaluate or assess.

'Peer-reviewed' evolved from the practice of 'peer review' in academic and professional settings, where work is evaluated by others in the same field.

Initially, it meant 'evaluated by peers,' and this meaning has remained consistent in modern usage.