diff --git a/html/englishEN.html b/html/englishEN.html
index d0cae30..c7adc34 100644
--- a/html/englishEN.html
+++ b/html/englishEN.html
@@ -235,7 +235,7 @@ For Linux systemwide installation, these mods are in <i>/usr/share/minetest/game
 
 <h2><a name="chap4">Chapter 4: ABMs</a></h2>
 
-ABMs add actions to blocks. For instance, the tutorial-wood could become normal wood after a few seconds.<br />
+ABMs stands for "Active Block Modifiers" and they add actions to blocks. For instance, the tutorial-wood could become normal wood after a few seconds.<br />
 
 <div id="step">Append this code to your init.lua:</div>