decalage

plural decalages

1. countableuncountableaeronauticsThe difference in angle of incidence between the main wing and horizontal stabilizer, or between the canard and main wing, of an airplane.
2. countableuncountableaeronauticsThe difference in angle of incidence of the two wings of a biplane.
3. countableuncountableaeronauticsThe angle between two geometric lines that define an aerofoil.
4. countableuncountablehuman sciencesIn Piagetian developmental psychology, the inability to apply a learned function across all problems (horizontal decalage) or across different developmental stages (vertical decalage).