A related term is a Preferred Term which can be linked to another Preferred Term conceptually but not hierarchically (for example, bulkhead and bulkhead light. The thesaurus allows for terms to be related in the same hierarchy when a particularly strong link occurs (for example, box mast and top mast).
A term that is associatively but not hierarchically linked to another term in a controlled vocabulary. In thesauri, the relationship indicator for this type of term is RT.
A concept that is associatively but not hierarchically linked to another descriptor in a thesaurus.
terme connexe Term is not a synonym, quasi-synonym, broader or narrower term, but is associated with another term Source: National Archives of Australia