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von Willebrand's disease von Wil·le·brand's disease (vŏn wĭl'ə-brāndz', fôn vĭl'ə-bränts')
A hereditary predisposition to hemorrhaging characterized by bleeding from mucous membranes and various abnormalities in the blood components responsible for clotting. Also called angiohemophilia, vascular hemophilia.