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[lim-fuh-sahy-toh-sis] /ˌlɪm fə saɪˈtoʊ sɪs/
noun, Pathology.
an abnormal increase in the number of lymphocytes in the blood.
Origin of lymphocytosis
First recorded in 1895-1900; lymphocyte + -osis
Related forms
[lim-foh-sahy-tot-ik] /ˌlɪm foʊ saɪˈtɒt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for lymphocytosis
Historical Examples
  • Doubtless in these cases also the lymphocytosis is due to the stimulation and swelling of the tracheobronchial glands.

    Histology of the Blood Paul Ehrlich
  • Only one single substance has so far been mentioned in the literature as capable in itself of producing a lymphocytosis.

    Histology of the Blood Paul Ehrlich
British Dictionary definitions for lymphocytosis


an abnormally large number of lymphocytes in the blood: often found in diseases such as glandular fever and smallpox
Derived Forms
lymphocytotic (ˌlɪmfəʊsaɪˈtɒtɪk) adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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lymphocytosis in Medicine

lymphocytosis lym·pho·cy·to·sis (lĭm'fō-sī-tō'sĭs)
A condition marked by an abnormal increase in the number of lymphocytes in the bloodstream, usually resulting from infection or inflammation. Also called lymphocythemia, lymphocytic leukocytosis.

lym'pho·cy·tot'ic (-tŏt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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