the world > plants > particular plants > cultivated or valued plants > plants used in dyeing > fruit, seed, or flower used in dyeing > [noun] > Avignon Berry (2)
the dried unripe fruit of any of various buckthorns (genus Rhamnus), used as the source of a yellow dye; also called Avignon berry.
The fruit of the Rhamnus infectorius, and kindred species, used for dyeing yellow, and for making the pigment sapgreen.