Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A condition marked by an abnormally large number of red blood cells in the circulatory system.

from The Century Dictionary.

  • noun Excess of red corpuscles in the blood.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun pathology A rare disorder in which the bone marrow produces an abnormally large amount of blood cells, often red blood cells.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a disorder characterized by an abnormal increase in the number of red blood cells in the blood

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[poly– + cyt(o)– + –hemia.]

Examples

  • Murphy blamed Gans 'death on "acute hydromorphone toxicity," and said Gans also had hypertensive cardiovascular disease, a high blood pressure condition, and a condition called polycythemia that caused his red blood cell count to go up.

    WIBW - HomePage - Headlines

  • The blood cancer identified in the Tamaqua area is known as polycythemia vera - an abnormal increase in blood cells (primarily red blood cells) due to excess production of the cells by the bone marrow.

    Times Leader News

  • Murphy blamed Gans 'death on "acute hydromorphone toxicity," and said Gans also had hypertensive cardiovascular disease, a high blood pressure condition, and a condition called polycythemia that caused his red blood cell count to go up.

    KLAS - Top Story News

  • Even professional mountaineers are at risk for experiencing "polycythemia," in which the body manufactures too many red blood cells in reaction to oxygen deprivation. high blood pressure of the lung vessels can trigger respiratory failure, which can be deadly.

    Medlogs - Recent stories

  • Such interventions, if fruitful in humans, might be useful against some cancers and other diseases, such as polycythemia vera, in which the body produces a life-threatening excess of blood cells.

    PhysOrg.com - latest science and technology news stories

  • Even professional mountaineers are at risk for experiencing "polycythemia," in which the body manufactures too many red blood cells in reaction to oxygen deprivation. high blood pressure of the lung vessels can trigger respiratory failure, which can be deadly.

    Medlogs - Recent stories

  • Even professional mountaineers are at risk for experiencing "polycythemia," in which the body manufactures too many red blood cells in reaction to oxygen deprivation. high blood pressure of the lung vessels can trigger respiratory failure, which can be deadly.

    Medlogs - Recent stories

  • Even professional mountaineers are at risk for experiencing "polycythemia," in which the body manufactures too many red blood cells in reaction to oxygen deprivation. high blood pressure of the lung vessels can trigger respiratory failure, which can be deadly.

    Medlogs - Recent stories

  • Such interventions, if fruitful in humans, might be useful against some cancers and other diseases, such as polycythemia vera, in which the body produces a life-threatening excess of blood cells.

    THE MEDICAL NEWS

  • Such interventions, if fruitful in humans, might be useful against some cancers and other diseases, such as polycythemia vera, in which the body produces a life-threatening excess of blood cells.

    PhysOrg.com - latest science and technology news stories

Comments

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  • "Indeed, bleeding—today called 'phlebotomy'—can actually help in some rare diseases, such as polycythemia, a rare genetic disorder that causes people to make too much blood, or hemachromatosis, when the blood carries too much iron."

    —John M. Barry, The Great Influenza (NY: Penguin Books, 2004), 22

    February 11, 2009