Dictionary

Rosetta stone

noun Ro·set·ta stone \rō-ˈze-tə-\

Definition of ROSETTA STONE

1
:  a black basalt stone found in 1799 that bears an inscription in hieroglyphics, demotic characters, and Greek and is celebrated for having given the first clue to the decipherment of Egyptian hieroglyphics
2
:  one that gives a clue to understanding

Origin of ROSETTA STONE

Rosetta, Egyptian
First Known Use: 1822

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