pas·sade 
(p
ə-säd
)
n.1. A dressage technique in which the horse turns in a circle, with the hindlegs making a smaller circle than the forelegs.
2. A passing flirtation or romance: "How can it be that the sympathy between two people like ourselves ... should end from one day to another like a mere passade?" (Edith Wharton).
[French, passado, passade, from Italian passata, from passare, to pass; see PASSAGE2.]