hemophilia

noun
he·​mo·​phil·​ia | \ ˌhē-mə-ˈfi-lē-ə How to pronounce hemophilia (audio) \

Definition of hemophilia

: a hereditary, sex-linked blood defect occurring almost exclusively in males that is marked by delayed clotting of the blood with prolonged or excessive internal or external bleeding after injury or surgery and in severe cases spontaneous bleeding into joints and muscles and that is caused by a deficiency of clotting factors

Note: Hemophilia is inherited as an X-linked recessive trait in which the mother must pass on a copy of the defective gene to a male child, and more rarely, both parents must pass on copies of the defective gene to a female child.

— see hemophilia a, hemophilia b

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Did You Know?

The dreaded disease known as hemophilia is the result of an inherited gene, and almost always strikes boys rather than girls (though mothers may pass the gene to their sons). Since the blood lacks an ingredient that causes it to clot or coagulate when a blood vessel breaks, even a minor wound can cause a hemophiliac to bleed to death if not treated. Bleeding can be particularly dangerous when it's entirely internal, with no visible wound, since the person may not be aware it's happening. Queen Victoria transmitted the hemophilia gene to royal families all across Europe; the hemophilia of a young Russian prince played a part in the downfall of the Russian czars. Today, hemophiliacs take drugs that stop the bleeding by speeding coagulation, and hemophiliac life expectancies in developed countries are almost as long as the average.

Examples of hemophilia in a Sentence

Recent Examples on the Web

Signature’s owners learned in June 2012, when their prior health insurance contract was expiring, that their payments could rise steeply due to the Wests’ hemophilia, according to the EEOC’s complaint. Lauren Weber, WSJ, "When Three Brothers With a Blood Disorder Lost Their Jobs, the EEOC Sued," 9 July 2018 Alexei, the heir to the Russian throne, was born with hemophilia (a disorder in which the blood does not clot normally), and Alexandra believed that mystic Rasputin possessed the ability to heal him. Heather Finn, Good Housekeeping, "Rasputin and Alexandra's Relationship in 'The Last Czars' Isn't What You Think It Is," 20 July 2019 Because of my hemophilia, I’ve been prepared to face death all of my life. Elena Nicolaou, refinery29.com, "Where Is Zachary Ailes, Roger Ailes' Son, Now?," 15 July 2019 Based on the four episodes made available to journalists, the series allows Ailes some complexity: the working-class upbringing, the hemophilia, the physically abusive father, the loving son and wife (played by Sienna Miller). Austin Considine, New York Times, "How Russell Crowe Channeled Roger Ailes in ‘The Loudest Voice’," 27 June 2019 According to STAT News, fetal tissue was involved in the discovery of treatments for rheumatoid arthritis, cystic fibrosis, and hemophilia. Amanda Macmillan, Health.com, "Fetal Tissue Research Facts and Why It's so Controversial," 6 June 2019 For example, what if one of the gene therapies being developed could cure the hemophilia of that young Iowan? Kate Bachelder Odell, WSJ, "When Medical Innovation Meets Politics," 24 Aug. 2018 Sales of new multiple sclerosis, hemophilia and cancer drugs have been propelling Roche’s pharmaceuticals business in recent quarters. Joseph Walker, WSJ, "Roche Executive Daniel O’Day Is Named Gilead CEO," 10 Dec. 2018 Leopold passed away young as the result of hemophilia, but not before having two children with his wife, Princess Helena—a daughter, Princess Anne, and a son, Charles Edward. Lauren Hubbard, Town & Country, "Queen Victoria's Descendants Still Reign Over Europe," 17 Feb. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hemophilia.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hemophilia

1872, in the meaning defined above

History and Etymology for hemophilia

New Latin

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Time Traveler for hemophilia

The first known use of hemophilia was in 1872

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More Definitions for hemophilia

hemophilia

noun

English Language Learners Definition of hemophilia

medical : a serious disease that causes a person who has been cut or injured to keep bleeding for a very long time

hemophilia

noun
he·​mo·​phil·​ia
variants: or chiefly British haemophilia \ ˌhē-​mə-​ˈfil-​ē-​ə How to pronounce haemophilia (audio) \

Medical Definition of hemophilia

: a tendency to uncontrollable bleeding especially : a hereditary, sex-linked blood disorder occurring almost exclusively in males that is marked by delayed clotting of the blood with prolonged or excessive internal or external bleeding after injury or surgery and in severe cases spontaneous bleeding into joints and muscles and that is caused by a deficiency of clotting factors

Note: Hemophilia is inherited as an X-linked recessive trait in which the mother must pass on a copy of the defective gene to a male child, and more rarely, both parents must pass on copies of the defective gene to a female child.

— see hemophilia a, hemophilia b — compare von willebrand disease

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More from Merriam-Webster on hemophilia

Rhyming Dictionary: Words that rhyme with hemophilia

Spanish Central: Translation of hemophilia

Nglish: Translation of hemophilia for Spanish Speakers

Britannica.com: Encyclopedia article about hemophilia

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