English Dictionary

Rosetta Stone

name

A large inscribed stone found near Rosetta, Egypt, in 1799, later used as a basis for understanding many previously undecipherable examples of hieroglyphic writing.

The Rosetta Stone is a famous artifact that was discovered near the town of Rosetta in Egypt.

意味（1）

A large inscribed stone found near Rosetta, Egypt, in 1799, later used as a basis for understanding many previously undecipherable examples of hieroglyphic writing.

意味（2）

(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.