eosinophil

1 of 2

adjective

eo·​sin·​o·​phil ˌē-ə-ˈsi-nə-ˌfil 

: eosinophilic sense 1

eosinophil

2 of 2

noun

: a granulocyte readily stained by eosin that is present at sites of allergic reactions and parasitic infections

Examples of eosinophil in a Sentence

Recent Examples on the Web

Adjective

Major clinical guidelines say that patients with lower eosinophil counts, especially under 100 to 150, generally indicate a low likelihood of responding to inhaled therapies. — Annika Kim Constantino, CNBC, 8 Sep. 2026

In addition to eosinophil counts, the researchers measured white blood cells, inflammation markers, pain intensity, complications and comorbidities (conditions such as asthma, migraine, fibromyalgia, and rheumatoid arthritis). — New Atlas, 13 Oct. 2025

Noun

Patients with and without eosinophilia were compared, with eosinophilia defined as ≥350 eosinophils per microliter of blood – a mild threshold, slightly lower than the standard 500 eosinophils per microliter. — New Atlas, 13 Oct. 2025

Struggles With a Rare Condition Parker lived with eosinophilic esophagitis (EoE), a chronic allergic condition where white blood cells called eosinophils build up in the esophagus. — Lucy Notarantonio, MSNBC Newsweek, 5 Sep. 2025

Word History

First Known Use

Adjective

circa 1882, in the meaning defined above

Noun

circa 1900, in the meaning defined above

Rhymes for eosinophil

• verapamil
• anthill
• backfill
• bluegill
• crossbill
• distil
• distill
• downhill
• dunghill
• foothill
• fulfil
• fulfill

Kids Definition

eosinophil

noun

eo·​sin·​o·​phil

ˌē-ə-ˈsin-ə-ˌfil

: a white blood cell with a granule-containing cytoplasm that is found in the body at sites of allergic reactions and parasitic infections

Medical Definition

eosinophil

1 of 2 adjective

eo·​sin·​o·​phil ˌē-ə-ˈsin-ə-ˌfil 

variants also eosinophile

-ˌfīl 

: eosinophilic sense 1

eosinophil

2 of 2 noun

variants also eosinophile

: a white blood cell or other granulocyte with cytoplasmic inclusions readily stained by eosin