What is the top navigation called when it is common to a network or suite of websites?

What is the top navigation bar called when it is common to a suite or network of sites with a common login, as in StackExchange, 37 Signals (Basecamp, Backpack, etc.), or Google Apps for Your Domain?

I'm talking about the navigation that on this site inclues the StackExchange dropdown, login, username, and search tool. What does StackExchange call it? 37 Signals? Google? What's a commonly understood phrase for common element?

I see in one thread that Microsoft calls it the "eyebrow navigation," but this is hardly a common term, and it has ambiguous meaning, since it's also a stand-in for breadcrumbs.

Note: I'm not talking about notification bars, butter bars, or the "flash" notification that appears temporarily at the very top to alert users to action results or company news.