synonym ring

Noun

 * 1) * 1982, F. N. Teskey, Principles of Text Processing:
 * A synonym ring is a set of words or phrases (which are regarded as synonymous). A thesaurus is a set of trees whose nodes are synonym rings.
 * 1) * 1985, Library Science with a Slant to Documentation:
 * Each term in a synonym ring is equally likely to occur in any relevant article and so it is necessary to search for them all rather than one preferred term.
 * Each term in a synonym ring is equally likely to occur in any relevant article and so it is necessary to search for them all rather than one preferred term.