diff --git a/src/ontology/obi-edit.owl b/src/ontology/obi-edit.owl
index 66344223..aed655c4 100644
--- a/src/ontology/obi-edit.owl
+++ b/src/ontology/obi-edit.owl
@@ -22033,6 +22033,21 @@ b) that the amount of analyte/measurand detected is over some predetermined thre
     
 
 
+    <!-- http://purl.obolibrary.org/obo/OBI_0003657 -->
+
+    <owl:Class rdf:about="http://purl.obolibrary.org/obo/OBI_0003657">
+        <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/IAO_0000030"/>
+        <obo:IAO_0000115>An information content entity that indicates the smallest increment that can be resolved on the scale of a measurement instrument.</obo:IAO_0000115>
+        <obo:IAO_0000117>Sebastian Duesing</obo:IAO_0000117>
+        <obo:IAO_0000118>least count</obo:IAO_0000118>
+        <obo:IAO_0000119>https://en.wikipedia.org/wiki/Least_count</obo:IAO_0000119>
+        <obo:IAO_0000233>https://github.com/obi-ontology/obi/issues/506</obo:IAO_0000233>
+        <obo:IAO_0000234>Philippe Rocca-Serra</obo:IAO_0000234>
+        <rdfs:label xml:lang="en">minimum resolved unit of measurement</rdfs:label>
+    </owl:Class>
+    
+
+
     <!-- http://purl.obolibrary.org/obo/OBI_0005246 -->
 
     <owl:Class rdf:about="http://purl.obolibrary.org/obo/OBI_0005246">