Xylostein \Xy*los"te*in\, n. [Xylo- + Gr. ? bone.] (Chem.) A glucoside found in the poisonous berries of a species of honeysuckle ({Lonicera xylosteum}), and extracted as a bitter, white, crystalline substance.
Lonicera xylosteum n : cultivated Eurasian shrub with twin yellowish-white flowers and scarlet fruit [syn: {European fly honeysuckle}, {European honeysuckle}]