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An eastern US tree, the bark of which contains iodine and tannins; it is analgesic, anthelmintic, antifungal, antiseptic, and laxative. It has been used internally for constipation, intestinal parasites, and oral ulcers, and topically for acne, athlete’s foot, eczema, fever blisters, jock itch, and psoriasis
shavings of the wood of this North American tree in the family Juglandaceae contain a toxin juglone; used as bedding, have caused edema of the lower limbs and laminitis in horses. Called also black walnut.