retronym

ret ro nym |ˈretrōnim ˈrɛtroʊnɪm ˈretroʊnɪm | ▶noun a new term created from an existing word in order to distinguish it from the meaning that has emerged through progress or technological development (e.g., cloth diaper is a retronym necessitated by the fact that diaper now more commonly refers to a disposable diaper ). ORIGIN 1980s: blend of retro- and -onym .

retronym

retronym |ˈrɛtrə (ʊ )nɪm | ▶noun a new term created from an existing word in order to distinguish the original referent of the existing word from a later one that is the product of progress or technological development (e.g. acoustic guitar for guitar ). ORIGIN 1980s: blend of retro- and -onym .