Dinosaurs

Roget's Thesaurus. We tend to think of a thesaurus as a collection of synonyms and antonyms. But Roget’s is essentially a reverse dictionary. With a dictionary, the user looks up a word to find its meaning. With Roget’s, the user start with an idea and then keeps flipping through the book until he finds the word that best expresses it. The organization of the book reflects the unique intelligence of the polymath that created it.