Ailevators are the trailing edge roll control surfaces of a wing that also lift or drop for pitch control. It is correct terminology on a flying wing (ie. Northrup, Horten, etc.)
<font face="Rockwell"> Ailevators are external central surfaces much smaller in area than the main wing. They are located slightly below the trailing edge of the main wing and towards the tips. There is a passageway for free airflow between the leading edge of the surface and the trailing edge of the main wing.</font>
<font face="Rockwell"> Ailevators are not a part of the main wing. They are independent surfaces located so that they favorably influence the airflow over the main wing. At high and medium speeds they cut down the drag on the main wing by smoothing out the airflow leaving the trailing edge.</font>
<font face="Rockwell"> The external surfaces are used as ailerons and elevators, hence the word AILEVATORS.</font>
http://www.twitt.org/GoodyearRacer.html (a post WWII flying wing aircraft)
Their use long predates computer transmitter mixes.
There used to be an Austrailian company that made a stand-alone elkectronic mixer (for Zagi wings) that didn't need a computerized transmiter mixing. Istill have one in my project box from a retired wing.