Rosetta Stone
English
The Rosetta Stone.
Proper noun
the Rosetta Stone
- A large inscribed stone found near Rosetta, Egypt, in 1799, later used as a basis for understanding many previously undecipherable examples of hieroglyphic writing.
- (by extension) Any source of information crucial to interpreting.
- My friend’s carefully-compiled notebook was the Rosetta Stone that opened up understanding of the physics lectures.
Translations
large inscribed stone
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