Juglandin \Jug"lan*din\, n. [L. juglans, -andis, a walnut: cf.
F. juglandine.] (Chem.)
An extractive matter contained in the juice of the green
shucks of the walnut ({Juglans regia}). It is used
medicinally as an alterative, and also as a black hair dye.
[1913 Webster]