eosinophil: meaning, definition, pronunciation and examples
C1/C2 (Specialized Technical)Technical/Formal
Quick answer
What does “eosinophil” mean?
A type of white blood cell that is part of the immune system, typically involved in fighting parasitic infections and allergic reactions.
Audio
Pronunciation
Definition
Meaning and Definition
A type of white blood cell that is part of the immune system, typically involved in fighting parasitic infections and allergic reactions.
A granular leukocyte (white blood cell) that stains readily with acidic eosin dyes. Eosinophils are produced in the bone marrow and circulate in the blood before migrating to tissues, particularly the respiratory and gastrointestinal tracts. They play a key role in immune responses against multicellular parasites and in modulating inflammatory responses, especially in allergy and asthma.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or spelling. Pronunciation follows general BrE/AmE patterns for the vowels and stress.
Connotations
Identical technical and clinical connotations in both varieties.
Frequency
Extremely low frequency in general discourse in both regions, restricted entirely to specialist fields.
Grammar
How to Use “eosinophil” in a Sentence
The eosinophil [VERB]...An increase in eosinophilsA count of eosinophilsStained for eosinophilsVocabulary
Collocations
Examples
Examples of “eosinophil” in a Sentence
adjective
British English
- The biopsy showed an eosinophil infiltrate in the tissue.
- An elevated eosinophil count can indicate an allergic response.
American English
- The pathologist noted eosinophil predominance in the sample.
- Her blood work revealed an eosinophil abnormality.
Usage
Meaning in Context
Business
Not used.
Academic
Used in medical, biomedical science, and immunology research papers and textbooks. Example: 'The study focused on eosinophil migration in asthmatic airways.'
Everyday
Virtually never used. A patient might hear it from a doctor discussing blood test results.
Technical
The primary context. Used in clinical pathology reports, hematology, immunology, and discussions of allergic diseases or parasitic infections.
Vocabulary
Synonyms of “eosinophil”
Neutral
Weak
Watch out
Common Mistakes When Using “eosinophil”
- Mispronouncing it as 'ee-oh-SIN-oh-fill' (stressing the second syllable incorrectly).
- Confusing it with 'basophil' or 'neutrophil', other types of white blood cells.
- Using it as a general term for any white blood cell.
FAQ
Frequently Asked Questions
A high eosinophil count (eosinophilia) often suggests an allergic reaction, a parasitic infection, an autoimmune condition, or, more rarely, certain types of cancer or bone marrow disorders.
Yes, eosinophils are a specific type of granulocyte, a category of white blood cells. They make up a small percentage of circulating white blood cells.
Both are granulocytes, but they have different roles. Neutrophils are the most abundant and are first responders to bacterial and fungal infections. Eosinophils are less common and are key players against parasites and in allergic inflammation.
Yes. In a standard blood smear stained with Romanowsky stains (like Wright-Giemsa), eosinophils are easily identified by their bright red-orange granules in the cytoplasm.
A type of white blood cell that is part of the immune system, typically involved in fighting parasitic infections and allergic reactions.
Eosinophil is usually technical/formal in register.
Eosinophil: in British English it is pronounced /ˌiːə(ʊ)ˈsɪnəfɪl/, and in American English it is pronounced /ˌiːoʊˈsɪnəfɪl/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of EOSIN (the red acidic dye) + PHIL (loving/fond of). An eosinophil is a cell that 'loves eosin' because it readily takes up its red stain.
Conceptual Metaphor
Often conceptualized as a SOLDIER or DEFENDER specialized against specific invaders (parasites), or as a MARKER/INDICATOR of specific disease states (allergy).
Practice
Quiz
What is the primary function of an eosinophil?