OSX key "menu" ?

[thomthom]

http://code.google.com/apis/sketchup/docs/ourdoc/tool.html

@unknownuser said:

* CONSTRAIN_MODIFIER_KEY = Shift Key
* CONSTRAIN_MODIFIER_MASK = Shift Key
*** COPY_MODIFIER_KEY = Menu on Mac, Ctrl on PC**
* COPY_MODIFIER_MASK = Alt on Mac, Ctrl on PC
* ALT_MODIFIER_KEY = Command on Mac, Menu on PC
* ALT_MODIFIER_MASK = Command on Mac, Alt on PC

What is the "menu" key?
When I look up the OSX shortcut descriptions I don't see anything that relates to "menu".
http://support.apple.com/kb/ht1343

[tbd]

I think it is a typo, as it is the ALT key on Mac. tested with a simple tool.