Histology. any cell, tissue, organism, or substance that has an affinity for eosin and other acid stains.
Cell Biology. a leukocyte having eosinophilic granules in the cytoplasm and usually a bilobate nucleus.


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. 2019

Examples from the Web for eosinophil

Historical Examples of eosinophil

  • The increase of eosinophil cells is not always relative, but may be absolute.

  • The eosinophil cells are completely excluded from this classification.

  • It is particularly easy to observe this point in eosinophil cells.

  • On the presence of iron in the granules of the eosinophil leucocytes.

  • The mast cell granulations are stained pure blue, the eosinophil red, the neutrophil in mixed colour.

British Dictionary definitions for eosinophil


eosinophile (ˌiːəʊˈsɪnəˌfaɪl)


a leucocyte with a multilobed nucleus and coarse granular cytoplasm that stains readily with acidic dyes such as eosin
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

eosinophil in Medicine




A type of white blood cell containing cytoplasmic granules that are easily stained by eosin or other acid dyes.eosinophilic leukocyte oxyphil oxyphilic leukocyte
A microorganism, cell, or histological element easily stained by eosin or other acid dyes.
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.