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 (bā′sə-fĭl, -zə-) also ba·so·phile (-fīl′, -fĭl)
A white blood cell that when activated releases histamine and other substances that are involved in allergic reactions. Basophils are found chiefly in the blood and sites of inflammation and have cytoplasmic granules that are stained with basic dyes.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈbeɪsəfɪl) or


(Biology) (of cells or cell contents) easily stained by basic dyes
(Biology) a basophil cell, esp a leucocyte
[C19: from Greek; see base1 + -phile]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈbeɪ sə fɪl)

also ba•so•phile

(-ˌfaɪl, -fɪl)

1. a basophilic cell, tissue, organism, or substance.
2. a white blood cell having a two-lobed nucleus and basophilic granules in its cytoplasm.
[1885–90; bas (ic dye) + -o- + -phil]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


A type of white blood cell readily stained by basic dyes.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.basophil - a leukocyte with basophilic granules easily stained by basic stains
leucocyte, leukocyte, WBC, white blood cell, white blood corpuscle, white cell, white corpuscle - blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
[6,9] Some researchers have linked APD with specific antibodies, this having been established by using immunofluorescent techniques and basophil degranulation tests. Skin test results with progesterone have shown immediate reactions (within 30 minutes), delayed reactions (24-48 hours later) and reactions with both immediate and delayed features.