diff --git a/README.md b/README.md
index 8ac4ef4..6903b89 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@ Notes:
 
 ## Advanced Usage
 
-### Specifying the model's state size
+### Specifying the model's state size (aka the *order* of higher-order Markov chains)
 
 State size is a number of words the probability of a next word depends on.