Centrifugal force

The apparent force occurring in curvilinear motion acting to deflect objects outward from the axis of rotation. For instance, when pulling out of a dive, it is the force pushing the pilot down in their seat.

Aviation Maintenance Technician Handbook — General, p. G-3

Also defined in 2 more sources

The apparent force that an object moving along a circular path exerts on the body constraining the object and that acts outwardly away from the center of rotation.

Helicopter Flying Handbook, p. G-2

An outward force that opposes centripetal force, resulting from the effect of inertia during a turn.

Pilot's Handbook of Aeronautical Knowledge, p. G-6