from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hereditary disease characterized by a tendency to hemorrhage, caused by a deficiency or abnormality of the blood proteins that control platelet activity.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An hereditary disease, characterized by a tendency to hemorrhage, and caused by a defect in blood platelet activity.
After Erik Adolf von Willebrand (1870-1949), Finnish physician.(American Heritage® Dictionary of the English Language, Fourth Edition)
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