sideslip

(aviation) A flight manoeuvre that uses opposing rudder and aileron inputs to move the aircraft sideways without turning it.

(aviation) A flight maneuver to rapidly lose speed and/or altitude whilst not altering the aircraft's ground track.

(aviation) A flight condition where an aircraft's longitudinal axis is not aligned with its direction of motion relative to the surrounding air.

(aviation, uncountable, by extension) The angle between an aircraft's longitudinal axis and its direction of motion relative to the surrounding air.