WordPress at a glance
action is not described

adminmenu action-hook . WP 2.5.0

Fires after the admin menu has been output.

Usage

add_action( 'adminmenu', 'action_function_name_7124' );
function action_function_name_7124(){
	// action...
}

Where the hook is called

In file: /wp-admin/menu-header.php
adminmenu
wp-admin/menu-header.php 270
do_action( 'adminmenu' );

Where the hook is used (in WP core)

Does not used.