decalage

Etymology
From.

Noun

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

Noun

 * 1) a difference between two elements
 * 2) lift (of an aircraft)