diff --git a/etc/conf.org b/etc/conf.org
index 2af4cb7..f868a4c 100644
--- a/etc/conf.org
+++ b/etc/conf.org
@@ -2381,7 +2381,6 @@ I use tags for agenda filtering (primarily for GTD contexts, see below). Each ta
         
         ;; gtd resource context 
         (,org-x-tag-laptop . ?l)
-        (,org-x-tag-tcult . ?t)
         (,org-x-tag-phone . ?p)
         
         ;; misc tags 
diff --git a/local/lib/org-x/org-x.el b/local/lib/org-x/org-x.el
index 8b2c11b..51c07cc 100644
--- a/local/lib/org-x/org-x.el
+++ b/local/lib/org-x/org-x.el
@@ -100,10 +100,6 @@
   (org-x-prepend-char org-x-tag-resource-prefix "laptop")
   "Tag denoting a laptop resource.")
 
-(defconst org-x-tag-tcult
-  (org-x-prepend-char org-x-tag-resource-prefix "tcult")
-  "Tag denoting a tissue-culture resource.")
-
 (defconst org-x-tag-phone
   (org-x-prepend-char org-x-tag-resource-prefix "phone")
   "Tag denoting a phone resource.")