".NET Framework" made sense when there was only one real framework available, but there is now Core, Compact, Mono, Unity, etc. which makes it confusing.
".NET Desktop" can be used instead, although it's also misleading since it has nothing to do with desktops. ".NET Full Framework" is also used often.
Perhaps the best name would be ".NET Legacy Framework" with the understanding that it is a heavy, slow-moving framework implementation that only runs on Windows (and is limited by the Windows version as well).
Note to self: .NET Framework = .NET Desktop.
I don't recall ever seeing the term .NET Desktop used anywhere, I assumed it was some compact version of .NET Framework.