diff --git a/src/libcore/iter.rs b/src/libcore/iter.rs
index be66623d0e1..679cb952268 100644
--- a/src/libcore/iter.rs
+++ b/src/libcore/iter.rs
@@ -578,6 +578,8 @@ fn partition<B, F>(self, mut f: F) -> (B, B) where
     /// Performs a fold operation over the entire iterator, returning the
     /// eventual state at the end of the iteration.
     ///
+    /// This operation is sometimes called 'reduce' or 'inject'.
+    ///
     /// # Examples
     ///
     /// ```