Glossary
What is adverse yaw?
The tendency of an airplane to yaw away from the direction it is rolling. The aileron that deflects down makes more lift and more drag than the one that deflects up, and that extra drag drags the nose toward the outside of the turn. Rudder is what offsets it.
That is the whole entry for now. The longer version, with the mechanics and worked examples, is still to be written. See autorotation for how those read once they exist.