thesaur- (Greek > Latin: treasure, treasury, storehouse, chest; a treasury of words).
A reference to a thesaurus.
thesauri (or thesauruses):
The plural form of thesaurus.
1. A book that lists words related to each other in meaning, usually giving synonyms and antonyms.
2. A dictionary of words relating to a particular subject.
3. A place in which valuable things are stored.