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 @@
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.