synonymy

[si-non-uh-mee]

noun, plural syn·on·y·mies for 3, 4.

the quality of being synonymous; equivalence in meaning.
the study of synonyms.
a set, list, or system of synonyms.
Biology. a list of the scientific names, with explanatory matter and location of type or types, for a particular taxonomic group.

Origin of synonymy

1600–10; < Late Latin synōnymia < Greek synōnymía. See synonymous, -y3
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British Dictionary definitions for synonymy

synonymy

noun plural -mies

the study of synonyms
the character of being synonymous; equivalence
a list or collection of synonyms, esp one in which their meanings are discriminated
biology a collection of the synonyms of a species or group
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