diff --git a/journal/2021-02-13.md b/journal/2021-02-13.md
index b98c5ee0c..c9d9233fe 100644
--- a/journal/2021-02-13.md
+++ b/journal/2021-02-13.md
@@ -9,6 +9,7 @@
 - [[push]] [[recipes]]
   - [[pull]] [[jerusalem]]
   - [[flourless banana bread]]
+- [[symbiont]]
 
 [//begin]: # "Autogenerated link references for markdown compatibility"
 [flan]: ../flan "Flan"
diff --git a/symbiont.md b/symbiont.md
new file mode 100644
index 000000000..52b80b337
--- /dev/null
+++ b/symbiont.md
@@ -0,0 +1,4 @@
+# Symbiont
+
+- an [[organism]] living in [[symbiosis]] with [[another]].
+