Rosetta stone

One entry found for Rosetta stone.

Main Entry: Ro·set·ta stone
Pronunciation: rO-'ze-t&-
Function: noun
Etymology: Rosetta, Egyptian
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