ROSETTA STONE


Meaning of ROSETTA STONE in English

n. a key to previously unattainable understanding.

[ a stone found near Rosetta in Egypt, with a trilingual inscription of the 2nd c. BC in Egyptian hieroglyphs, demotic, and Greek, important in the decipherment of hieroglyphs ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.