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A concept with a formal logic definition that is sufficient to distinguish its meaning from other similar concepts.


  1. The meaning of SNOMED CT concept is expressed in a human-readable form by its Fully Specified Name(FSN) and has a formal logic definition represented by a set of defining relationships to other concepts. A Sufficiently defined concept has sufficient defining relationships to computably distinguish it from any concepts or expressions that are equivalent to or a subtype of the the defined concept.

  2. Contrast with  primitive concept.


The  concept 74400008 |appendicitis (disorder)|is sufficiently defined by the following definition because any concept for which these defining relationships are true are either the disorder "appendicitis" or a subtype of "appendicitis".

Table: Definition of: 74400008|appendicitis (disorder)| - (sufficiently defined)


  • Fully defined concept