diff --git a/src/wp-admin/edit-form-advanced.php b/src/wp-admin/edit-form-advanced.php
index b710f6b7e6..bd229b90c9 100644
--- a/src/wp-admin/edit-form-advanced.php
+++ b/src/wp-admin/edit-form-advanced.php
@@ -219,7 +219,7 @@ $publish_callback_args = null;
 if ( post_type_supports($post_type, 'revisions') && 'auto-draft' != $post->post_status ) {
 	$revisions = wp_get_post_revisions( $post_ID );
 
-	// We should aim to show the revisions metabox only when there are revisions.
+	// We should aim to show the revisions meta box only when there are revisions.
 	if ( count( $revisions ) > 1 ) {
 		reset( $revisions ); // Reset pointer for key()
 		$publish_callback_args = array( 'revisions_count' => count( $revisions ), 'revision_id' => key( $revisions ) );
diff --git a/src/wp-admin/includes/deprecated.php b/src/wp-admin/includes/deprecated.php
index 7753004a60..2bf25d3336 100644
--- a/src/wp-admin/includes/deprecated.php
+++ b/src/wp-admin/includes/deprecated.php
@@ -1117,7 +1117,7 @@ function wp_create_thumbnail( $file, $max_side, $deprecated = '' ) {
 }
 
 /**
- * This was once used to display a metabox for the nav menu theme locations.
+ * This was once used to display a meta box for the nav menu theme locations.
  *
  * Deprecated in favor of a 'Manage Locations' tab added to nav menus management screen.
  *
diff --git a/src/wp-admin/includes/media.php b/src/wp-admin/includes/media.php
index a865e1558c..8b95181c54 100644
--- a/src/wp-admin/includes/media.php
+++ b/src/wp-admin/includes/media.php
@@ -2818,7 +2818,7 @@ function edit_form_image_editor( $post ) {
 }
 
 /**
- * Displays non-editable attachment metadata in the publish metabox
+ * Displays non-editable attachment metadata in the publish meta box.
  *
  * @since 3.5.0
  */
diff --git a/src/wp-admin/includes/nav-menu.php b/src/wp-admin/includes/nav-menu.php
index ab83baa9bc..cb5b3b2b8e 100644
--- a/src/wp-admin/includes/nav-menu.php
+++ b/src/wp-admin/includes/nav-menu.php
@@ -123,7 +123,7 @@ function _wp_ajax_menu_quick_search( $request = array() ) {
 }
 
 /**
- * Register nav menu metaboxes and advanced menu items
+ * Register nav menu meta boxes and advanced menu items.
  *
  * @since 3.0.0
  **/
@@ -178,7 +178,7 @@ function wp_initial_nav_menu_meta_boxes() {
 }
 
 /**
- * Creates metaboxes for any post type menu item.
+ * Creates meta boxes for any post type menu item..
  *
  * @since 3.0.0
  */
@@ -212,7 +212,7 @@ function wp_nav_menu_post_type_meta_boxes() {
 }
 
 /**
- * Creates metaboxes for any taxonomy menu item.
+ * Creates meta boxes for any taxonomy menu item.
  *
  * @since 3.0.0
  */
@@ -252,7 +252,7 @@ function wp_nav_menu_disabled_check( $nav_menu_selected_id ) {
 }
 
 /**
- * Displays a metabox for the custom links menu item.
+ * Displays a meta box for the custom links menu item.
  *
  * @since 3.0.0
  *
@@ -289,7 +289,7 @@ function wp_nav_menu_item_link_meta_box() {
 }
 
 /**
- * Displays a metabox for a post type menu item.
+ * Displays a meta box for a post type menu item.
  *
  * @since 3.0.0
  *
@@ -568,7 +568,7 @@ function wp_nav_menu_item_post_type_meta_box( $object, $post_type ) {
 }
 
 /**
- * Displays a metabox for a taxonomy menu item.
+ * Displays a meta box for a taxonomy menu item.
  *
  * @since 3.0.0
  *
diff --git a/src/wp-admin/includes/post.php b/src/wp-admin/includes/post.php
index cd1074827f..1d397ea0c6 100644
--- a/src/wp-admin/includes/post.php
+++ b/src/wp-admin/includes/post.php
@@ -1166,7 +1166,7 @@ function wp_edit_attachments_query( $q = false ) {
 }
 
 /**
- * Returns the list of classes to be used by a metabox
+ * Returns the list of classes to be used by a meta box.
  *
  * @since 2.5.0
  *
diff --git a/src/wp-includes/general-template.php b/src/wp-includes/general-template.php
index 4f2be9fb3f..bf0614bd22 100644
--- a/src/wp-includes/general-template.php
+++ b/src/wp-includes/general-template.php
@@ -2947,7 +2947,7 @@ function wp_default_editor() {
  * _WP_Editors should not be used directly. See https://core.trac.wordpress.org/ticket/17144.
  *
  * NOTE: Once initialized the TinyMCE editor cannot be safely moved in the DOM. For that reason
- * running wp_editor() inside of a metabox is not a good idea unless only Quicktags is used.
+ * running wp_editor() inside of a meta box is not a good idea unless only Quicktags is used.
  * On the post edit screen several actions can be used to include additional editors
  * containing TinyMCE: 'edit_page_form', 'edit_form_advanced' and 'dbx_post_sidebar'.
  * See https://core.trac.wordpress.org/ticket/19173 for more information.
diff --git a/src/wp-includes/taxonomy.php b/src/wp-includes/taxonomy.php
index 9999d211b7..d5d8a344b5 100644
--- a/src/wp-includes/taxonomy.php
+++ b/src/wp-includes/taxonomy.php
@@ -475,7 +475,7 @@ function register_taxonomy( $taxonomy, $object_type, $args = array() ) {
 
 	$wp_taxonomies[ $taxonomy ] = (object) $args;
 
-	// register callback handling for metabox
+	// Register callback handling for meta box.
  	add_filter( 'wp_ajax_add-' . $taxonomy, '_wp_ajax_add_hierarchical_term' );
 
 	/**
@@ -528,7 +528,7 @@ function unregister_taxonomy( $taxonomy ) {
 		remove_permastruct( $taxonomy );
 	}
 
-	// Unregister callback handling for metabox.
+	// Unregister callback handling for meta box.
 	remove_filter( 'wp_ajax_add-' . $taxonomy, '_wp_ajax_add_hierarchical_term' );
 
 	// Remove the taxonomy.