An example of thesaurus is Roget's II: The New Thesaurus.
Origin of thesaurus
- Latin thēsaurus treasury from Greek thēsauros
From American Heritage Dictionary of the English Language, 5th Edition
- 16th century, from Latin thÄ“saurus, from Ancient Greek Î¸Î·ÏƒÎ±Ï…ÏÏŒÏ‚ (thÄ“sauros, “storehouse, treasure"); its current English usage/meaning was established soon after the publication of Peter Roget's Thesaurus of English Words and Phrases in 1852