diff --git a/glossary.tex b/glossary.tex
index 342a68ad37af0f92a61142f090f68aa25ffc2df3..e5be7f8c6dd33adf257d7f90bc4d630980267281 100644
--- a/glossary.tex
+++ b/glossary.tex
@@ -181,6 +181,11 @@
   description={is a great orb in the sky, commonly supposed to be where the gods live}
 }
 
+\newglossaryentry{fenestra}{
+  name={Fenestra},
+  description={is the world we live on}
+}
+
 %%%%% Symbols
 
 \newglossaryentry{N}{