i sent the following feedback to Apple:
in leopard, as you know, there is blue spotlights, so this definition is incorrect.
The Leopard dictionary "Apple" states the following for "Dock"
An application launcher that comes with Mac OS X. The Dock is located along the edge of the screen. It contains icons for many of the applications available on the computer, and you can drag icons to and from the Dock. The Dock shows that an application is running by displaying a small black triangle below or next to its icon.
notice how it says a black triangle. in Leopard, its a blue spotlight.
in leopard, as you know, there is blue spotlights, so this definition is incorrect.