diff --git a/graph2.ttl b/graph2.ttl
index 11b0fdc..e8ff661 100644
--- a/graph2.ttl
+++ b/graph2.ttl
@@ -130,3 +130,10 @@ ex2:micrometre ex2:name            "micrometre"@en .
 ex2:micrometre ex2:symbol          "μm" .
 ex2:micrometre ex2:oneEqualsOfBase 0.000001 .
 
+
+ex2:nanometre a                   ex2:Unit .
+ex2:nanometre ex2:quantityKind    ex2:length .
+ex2:nanometre ex2:name            "nanometre"@en .
+ex2:nanometre ex2:symbol          "nm" .
+ex2:nanometre ex2:oneEqualsOfBase 1000000000 .
+