Definitions for "Adverse Yaw"
Keywords:  yaw, aileron, drag, airplane, tendency
When turning an airplane using only ailerons, the drag of the lowered aileron is greater that that of the raised aileron; this extra drag tend to yaw the airplane in a direction that's the opposite of what the pilot intended.
The tendency of an aircraft to yaw in the opposite direction of aileron control input.
The tendency of an airplane to yaw in the direction opposite to the tail