neutrophil /ˈnjuːtɹəfɪl/adjective 1noun 1forms 1 adjective1 •Of a cell: being more easily or more fully stained by neutral dyes than by acidic or alkaline (basic) ones. noun1 •Such a cell, especially a particular type of white blood cell.One litre of human blood contains about five billion neutrophils (around half of all white blood cells). — 2011 formsneutrophils