bi·ga·rade 
(b
ē′gä-räd
)
n. 1. See bitter orange.
2. A rich sauce served with duck, consisting of thickened stock flavored with the rind of bitter oranges, and often with lemon juice and sugar.
[French, from Provençal bigarrado, variegated, bigarade (bitter oranges possibly being so called from varieties with striated fruit or variegated foliage), from past participle of bigarrar, to variegate, from Middle French bigarrer : bi-, two (from Latin; see BI-1) + garre, of two colors (from Old French, of unknown origin).]