Add :term:s for iterator.
diff --git a/Doc/library/csv.rst b/Doc/library/csv.rst
index 153dc89..98fc6c9 100644
--- a/Doc/library/csv.rst
+++ b/Doc/library/csv.rst
@@ -62,7 +62,7 @@
.. function:: reader(csvfile[, dialect='excel'][, fmtparam])
Return a reader object which will iterate over lines in the given *csvfile*.
- *csvfile* can be any object which supports the iterator protocol and returns a
+ *csvfile* can be any object which supports the :term:`iterator` protocol and returns a
string each time its :meth:`next` method is called --- file objects and list
objects are both suitable. If *csvfile* is a file object, it must be opened
with the 'b' flag on platforms where that makes a difference. An optional