hemophilia B
noun
: a mild to severe hemophilia that is caused by a deficiency of factor IX
called also Christmas disease
compare hemophilia aExamples of hemophilia B in a Sentence
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Scientists across the country continue researching gene therapy and gene replacement therapy to treat hemophilia B and other forms the blood disorder, according to the Cleveland Clinic.
—
Beth Warren, The Tennessean, 21 Aug. 2025
The firm plans to begin treating patients with severe hemophilia B in the United States by March 31.
—Jonathan Saltzman, BostonGlobe.com, 29 Jan. 2023
Pfizer said Thursday that its experimental gene therapy for hemophilia B significantly reduced the number of bleeds patients experienced over a year.
—Jason Mast, STAT, 29 Dec. 2022
The Food and Drug Administration cleared Hemgenix, an IV treatment for adults with hemophilia B, the less common form of the genetic disorder which primarily affects men.
—Matthew Perrone, Fortune, 23 Nov. 2022
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Beth Warren, The Tennessean, 21 Aug. 2025
The firm plans to begin treating patients with severe hemophilia B in the United States by March 31.
—Jonathan Saltzman, BostonGlobe.com, 29 Jan. 2023
Pfizer said Thursday that its experimental gene therapy for hemophilia B significantly reduced the number of bleeds patients experienced over a year.
—Jason Mast, STAT, 29 Dec. 2022
The Food and Drug Administration cleared Hemgenix, an IV treatment for adults with hemophilia B, the less common form of the genetic disorder which primarily affects men.
—Matthew Perrone, Fortune, 23 Nov. 2022
See All Example Sentences for hemophilia B
Cite this Entry
“Hemophilia B.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hemophilia%20B. Accessed 19 Sep. 2025.
Copy CitationMedical Definition
hemophilia B
noun
: a mild to severe hemophilia that is caused by a deficiency of factor IX in the blood
Hemophilia B occurs mostly in males.… The inadequate or inactive supply of clotting factor results in periodic internal bleeding.—K. A. Fackelmann, Science News
K. A. Fackelmann, Science Newscalled also Christmas disease
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