Add cross-references to the glossary entry for file objects.
diff --git a/Doc/library/termios.rst b/Doc/library/termios.rst
index 591850e..a90a825 100644
--- a/Doc/library/termios.rst
+++ b/Doc/library/termios.rst
@@ -17,7 +17,7 @@
All functions in this module take a file descriptor *fd* as their first
argument. This can be an integer file descriptor, such as returned by
-``sys.stdin.fileno()``, or a file object, such as ``sys.stdin`` itself.
+``sys.stdin.fileno()``, or a :term:`file object`, such as ``sys.stdin`` itself.
This module also defines all the constants needed to work with the functions
provided here; these have the same name as their counterparts in C. Please