Clarify that named tuples do not have to subclass tuple.
diff --git a/Doc/glossary.rst b/Doc/glossary.rst
index 0eb3111..808993e 100644
--- a/Doc/glossary.rst
+++ b/Doc/glossary.rst
@@ -396,7 +396,7 @@
also :term:`immutable`.
named tuple
- Any tuple subclass whose indexable elements are also accessible using
+ Any tuple-like class whose indexable elements are also accessible using
named attributes (for example, :func:`time.localtime` returns a
tuple-like object where the *year* is accessible either with an
index such as ``t[0]`` or with a named attribute like ``t.tm_year``).