diff --git a/src/wp-admin/about.php b/src/wp-admin/about.php
index 02dd6abd2e319..3afc38c8bca42 100644
--- a/src/wp-admin/about.php
+++ b/src/wp-admin/about.php
@@ -68,7 +68,7 @@
 			</div>
 			<div class="column is-vertically-aligned-center">
 				<h3><?php _e( 'Do everything in the Site Editor' ); ?></h3>
-				<p><?php _e( 'WordPress 6.3 brings your content, templates, and patterns together in the Site Editor for the first time. Add pages, browse style variations, create synced patterns, and enjoy fine-tuned control over your navigation menus. No more time wasted switching across different site areas—now you can focus on what matters most. Creation to completion, all in one place.' ); ?></p>
+				<p><?php _e( 'WordPress 6.3 brings your content, templates, and patterns together in the Site Editor for the first time. Add pages, browse style variations, create synced patterns (previously referred to as “reusable blocks”), and enjoy fine-tuned control over your navigation menus. No more time wasted switching across different site areas—now you can focus on what matters most. Creation to completion, all in one place.' ); ?></p>
 			</div>
 		</div>
 
diff --git a/src/wp-includes/blocks.php b/src/wp-includes/blocks.php
index 4b39ff2400945..dc7cfbe2f7bae 100644
--- a/src/wp-includes/blocks.php
+++ b/src/wp-includes/blocks.php
@@ -670,9 +670,11 @@ function has_blocks( $post = null ) {
  *
  * This test optimizes for performance rather than strict accuracy, detecting
  * whether the block type exists but not validating its structure and not checking
- * reusable blocks. For strict accuracy, you should use the block parser on post content.
+ * patterns (previously referred to as reusable blocks). For strict accuracy, you
+ * should use the block parser on post content.
  *
  * @since 5.0.0
+ * @since 6.3.0 Reusable Blocks renamed to Patterns.
  *
  * @see parse_blocks()
  *
diff --git a/src/wp-includes/blocks/block.php b/src/wp-includes/blocks/block.php
index d51b35d68b23d..d7906d4869b40 100644
--- a/src/wp-includes/blocks/block.php
+++ b/src/wp-includes/blocks/block.php
@@ -8,6 +8,8 @@
 /**
  * Renders the `core/block` block on server.
  *
+ * @since 6.3.0 Reusable Blocks renamed to Patterns.
+ *
  * @param array $attributes The block attributes.
  *
  * @return string Rendered HTML of the referenced block.
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-blocks-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-blocks-controller.php
index 305647451b02c..ae5c1ad99ff3b 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-blocks-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-blocks-controller.php
@@ -9,10 +9,11 @@
 
 /**
  * Controller which provides a REST endpoint for the editor to read, create,
- * edit and delete reusable blocks. Blocks are stored as posts with the wp_block
- * post type.
+ * edit and delete patterns (previously referred to as reusable blocks). Patterns are
+ * stored as posts with the wp_block post type.
  *
  * @since 5.0.0
+ * @since 6.3.0 Reusable Blocks renamed to Patterns.
  *
  * @see WP_REST_Posts_Controller
  * @see WP_REST_Controller
@@ -20,12 +21,13 @@
 class WP_REST_Blocks_Controller extends WP_REST_Posts_Controller {
 
 	/**
-	 * Checks if a block can be read.
+	 * Checks if a pattern (previously referred to as reusable block) can be read.
 	 *
 	 * @since 5.0.0
+   * @since 6.3.0 Reusable Blocks renamed to Patterns.
 	 *
 	 * @param WP_Post $post Post object that backs the block.
-	 * @return bool Whether the block can be read.
+	 * @return bool Whether the pattern (previously referred to as reusable block) can be read.
 	 */
 	public function check_read_permission( $post ) {
 		// By default the read_post capability is mapped to edit_posts.
@@ -41,6 +43,7 @@ public function check_read_permission( $post ) {
 	 *
 	 * @since 5.0.0
 	 * @since 6.3.0 Adds the `wp_pattern_sync_status` postmeta property to the top level of response.
+	 * @since 6.3.0 Reusable Blocks renamed to Patterns.
 	 *
 	 * @param array  $data    Response data to filter.
 	 * @param string $context Context defined in the schema.
@@ -64,9 +67,11 @@ public function filter_response_by_context( $data, $context ) {
 	}
 
 	/**
-	 * Retrieves the block's schema, conforming to JSON Schema.
+	 * Retrieves the patterns (previously referred to as reusable blocks) schema, conforming
+	 * to JSON Schema.
 	 *
 	 * @since 5.0.0
+	 * @since 6.3.0 Reusable Blocks renamed to Patterns.
 	 *
 	 * @return array Item schema data.
 	 */
diff --git a/tests/phpunit/tests/rest-api/rest-blocks-controller.php b/tests/phpunit/tests/rest-api/rest-blocks-controller.php
index 1cdd3474dd174..5a62b9baf51a2 100644
--- a/tests/phpunit/tests/rest-api/rest-blocks-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-blocks-controller.php
@@ -98,12 +98,14 @@ public function data_capabilities() {
 
 	/**
 	 * Exhaustively check that each role either can or cannot create, edit,
-	 * update, and delete reusable blocks.
+	 * update, and delete patterns (previously referred to as reusable blocks).
 	 *
 	 * @ticket 45098
 	 *
 	 * @dataProvider data_capabilities
 	 *
+	 * @since 6.3.0 Reusable Blocks renamed to Patterns.
+	 *
 	 * @param string $action          Action to perform in the test.
 	 * @param string $role            User role to test.
 	 * @param int    $expected_status Expected HTTP response status.