: polycythemia of unknown cause that is marked by increase in total blood volume and accompanied by nosebleed, distension of the circulatory vessels, and enlargement of the spleen
called also erythremia
Examples of polycythemia vera in a Sentence
Recent Examples on the Web
Blood cancers, such as polycythemia vera, might be able to explain the high concentrations of blood cells.
—
Beth Mole, ArsTechnica, 28 May 2025
Lemon has been dealing with a rare and incurable blood disorder known as polycythemia vera, which causes his bone marrow to produce an excess of red blood cells.
—Matt Murschel, Orlando Sentinel, 4 Mar. 2025
Healthy bone marrow constantly supports your bone renewal and produces red blood cells (RBCs), white blood cells (WBCs), and platelets.
Diseases that affect bone marrow include leukemia, polycythemia vera, and aplastic anemia.
—Gagandeep Brar, Verywell Health, 14 Feb. 2025
Examples include polycythemia vera and essential thrombocytosis.
—Doru Paul, Health, 10 Jan. 2025
For example, polycythemia vera causes the body to make too many red blood cells.
—Elizabeth Millard, Cpt, SELF, 15 Aug. 2024
For example, polycythemia vera occurs when there are too many red blood cells, while essential thrombocythemia can crop up when the body produces too many platelets, which normally help with clotting.
—Brittany Risher, SELF, 30 July 2024
Those who worked or lived at Camp Lejeune over the study period had at least a 20% higher risk of all myeloid cancers, including polycythemia vera, certain kinds of lung cancer and female ductal breast cancer.
—Brenda Goodman, CNN, 31 Jan. 2024
In polycythemia vera, the bone marrow makes too much red blood cells.
—Dr. Keith Roach, oregonlive, 11 Nov. 2021
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Beth Mole, ArsTechnica, 28 May 2025
Lemon has been dealing with a rare and incurable blood disorder known as polycythemia vera, which causes his bone marrow to produce an excess of red blood cells.
—Matt Murschel, Orlando Sentinel, 4 Mar. 2025
Healthy bone marrow constantly supports your bone renewal and produces red blood cells (RBCs), white blood cells (WBCs), and platelets.
Diseases that affect bone marrow include leukemia, polycythemia vera, and aplastic anemia.
—Gagandeep Brar, Verywell Health, 14 Feb. 2025
Examples include polycythemia vera and essential thrombocytosis.
—Doru Paul, Health, 10 Jan. 2025
For example, polycythemia vera causes the body to make too many red blood cells.
—Elizabeth Millard, Cpt, SELF, 15 Aug. 2024
For example, polycythemia vera occurs when there are too many red blood cells, while essential thrombocythemia can crop up when the body produces too many platelets, which normally help with clotting.
—Brittany Risher, SELF, 30 July 2024
Those who worked or lived at Camp Lejeune over the study period had at least a 20% higher risk of all myeloid cancers, including polycythemia vera, certain kinds of lung cancer and female ductal breast cancer.
—Brenda Goodman, CNN, 31 Jan. 2024
In polycythemia vera, the bone marrow makes too much red blood cells.
—Dr. Keith Roach, oregonlive, 11 Nov. 2021
Cite this Entry
“Polycythemia vera.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polycythemia%20vera. Accessed 18 Jul. 2025.
Copy CitationMedical Definition
polycythemia vera
noun
polycythemia ve·ra
-ˈvir-ə 
: chronic polycythemia that is a myeloproliferative disorder of unknown cause characterized by an increase in total blood volume and viscosity and typically accompanied by nosebleed, headache, dizziness, weakness, itchy skin, reddish complexion, distension of the circulatory vessels, and enlargement of the spleen
called also erythremia, erythrocythemia, Vaquez's disease
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