eosinophilic Syllabification: (e·o·sin·o·phil·ic)Pronunciation: /ˌēəˌsinəˈfilik/Definition of eosinophilic adjective 1 Physiology (of a cell or its contents) readily stained by eosin. 2 Medicine relating to or marked by eosinophilia. eosinophilic in other Oxford dictionaries Definition of eosinophilic in the British & World English dictionary