diff --git a/src/cco-modules/QualityOntology.ttl b/src/cco-modules/QualityOntology.ttl
index 3fddf15..0672587 100644
--- a/src/cco-modules/QualityOntology.ttl
+++ b/src/cco-modules/QualityOntology.ttl
@@ -854,7 +854,7 @@ cco:Transparent rdf:type owl:Class ;
 ###  http://www.ontologyrepository.com/CommonCoreOntologies/Triangular
 cco:Triangular rdf:type owl:Class ;
                rdfs:subClassOf cco:ShapeQuality ;
-               cco:definition "A Shape Quality inhering in a bearer in virtue of it having three angles and three sides."@en ;
+               cco:definition "A Shape Quality inhering in a bearer in virtue of it having exactly three angles and exactly three sides."@en ;
                cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/QualityOntology"^^xsd:anyURI ;
                rdfs:label "Triangular"@en .
 
@@ -965,4 +965,4 @@ cco:Yellow rdf:type owl:Class ;
            rdfs:label "Yellow"@en .
 
 
-###  Generated by the OWL API (version 4.5.9.2019-02-01T07:24:44Z) https://github.com/owlcs/owlapi
\ No newline at end of file
+###  Generated by the OWL API (version 4.5.9.2019-02-01T07:24:44Z) https://github.com/owlcs/owlapi