The story
Coined by Mikhail Epstein in 2003, from Ancient Greek πρῶτος (prôtos, “first”) + Ancient Greek λόγος (lógos, “word”) + -ism, by analogy with prototype and neologism.
Etymology from Wiktionary, CC BY-SA 4.0.
protologism
Today it means: A newly coined word or phrase defined in the hope that it will become common; a recently created term possibly in narrow use but not yet acknowledged. Full definition →