/si non"euh mee/ , n. , pl. synonymies for 3, 4.
1. the quality of being synonymous; equivalence in meaning.
2. the study of synonyms.
3. a set, list, or system of synonyms.
4. Biol. a list of the scientific names, with explanatory matter and location of type or types, for a particular taxonomic group.
[ 1600-10; synonymia synonymía. See SYNONYMOUS, -Y 3 ]