diff --git a/glossary/WebGL.md b/glossary/WebGL.md
index d8b6167ed..4245d4282 100644
--- a/glossary/WebGL.md
+++ b/glossary/WebGL.md
@@ -1,3 +1,4 @@
 ### WebGL
 
 WebGL stands for Web Graphics Library and is a JavaScript API that can be used for drawing interactive 2D and 3D graphics.
+WebGL is based on OpenGL and can be invoked within HTML `<canvas>` elements, which provide a rendering surface.