Wireless USB interface
Wiki says this about USB: -


  Universal Serial Bus (USB) is an industry standard developed in the
  mid-1990s that defines the cables, connectors and communications
  protocols used in a bus for connection, communication, and power
  supply between computers and electronic devices.


What should Wireless-USB mean? Well, it's a problematic definition because USB all about: -


Cables
Connectors
Comms Protocol
Power


Realistically to refer to "wireless USB" is to imply wireless-cables, wireless-connector and wireless-power and this sounds stupid so, my advise is, if you want to transmit wirelessly between points A and B via something plugged into a USB port (the A end) then don't call it "wireless USB" because it isn't. 

At the far-end (point B) there could be another computer-like device with something plugged into its USB that is able to receive packets of data from the similar device at point A but the device plugged into B's USB port is not a wireless USB - it's a dongle that can send data to A or receive data from A.

There are plenty of radio sub-systems/modules around that could fit the bill but it all depends on what you want to do with it rather than what you want to call it.

Here is what Nordic have to offer (the red lines were drawn by me): -