• synonyms


  1. Histology. any cell, tissue, organism, or substance that has an affinity for eosin and other acid stains.
  2. Cell Biology. a leukocyte having eosinophilic granules in the cytoplasm and usually a bilobate nucleus.
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  1. eosinophilic.
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Also e·o·sin·o·phile [ee-uh-sin-uh-fahyl] /ˌi əˈsɪn əˌfaɪl/.

Origin of eosinophil

First recorded in 1885–90; eosin + -o- + -phil(e)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for eosinophiles

Historical Examples

  • Eosinophiles are formed in the bone-marrow from eosinophilic myelocytes.

    A Manual of Clinical Diagnosis

    James Campbell Todd

  • This would explain the rle of the eosinophiles in the black-fly lesion.

    Handbook of Medical Entomology

    William Albert Riley

  • Other381 varieties—the eosinophiles, lymphocytes, etc.—are less mobile and have still less marked phagocytic properties.

  • Very constant also is a marked absolute, and often a relative, increase of eosinophiles and basophiles.

  • The completeness and rapidity of the breaking down depends on the number of eosinophiles present.

    Handbook of Medical Entomology

    William Albert Riley

British Dictionary definitions for eosinophiles


eosinophile (ˌiːəʊˈsɪnəˌfaɪl)

  1. a leucocyte with a multilobed nucleus and coarse granular cytoplasm that stains readily with acidic dyes such as eosin
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Derived Formseosinophilic or eosinophilous (ˌiːəʊsɪˈnɒfɪləs), 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

eosinophiles in Medicine


  1. A type of white blood cell containing cytoplasmic granules that are easily stained by eosin or other acid dyes.eosinophilic leukocyte oxyphil oxyphilic leukocyte
  2. A microorganism, cell, or histological element easily stained by eosin or other acid dyes.
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Related formse′o•sin′o•philic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.