Why is a thesaurus called a thesaurus?

Related questions

1. What is the function of thesaurus in MS Word?
2. What is an encyclopedia and why would you use it?
3. What are the types of encyclopedia?
4. What is a synonym for encyclopedia?
5. What is a thesaurus used to look up?
6. What is dictionary and its importance?
7. Do thesaurus have antonyms?
8. What was the first thesaurus?
9. What type of words are often confused with contractions?
10. What is the meaning of thesaurus in computer?

Tags

1. #sauros
2. #really
3. #which
4. #items
5. #istock
6. #thesaurus
7. #diction
8. #consider
9. #trove
10. #logophiles
11. #comes
12. #greek
13. #storehouse
14. #precious
15. #means
16. #derives
17. #treasure