diff --git a/dpbo.obo b/dpbo.obo
index 5cd09d4..21fda14 100644
--- a/dpbo.obo
+++ b/dpbo.obo
@@ -1004,6 +1004,11 @@ id: DPBO:0000100
 name: growth time
 def: "Duration of a bacterial cultivation." []
 
+[Term]
+id: DPBO:0000101
+name: start OD600
+def: "The OD600 that was used to incoculate a bacterial culture." []
+
 [Term]
 id: DPBO:0002000
 name: alias