The Collaborative International Dictionary of English v.0.48:

Neutrophil \Neu"tro*phil\, Neutrophile \Neu"tro*phile\, n. [L.
   neuter + Gr. ? loving.] (Physiol.)
   One of a group of leukocytes whose granules stain only with
   neutral dyes; it is the chief phagocytic leukocyte in the
   circulating blood, comprising from 54% to 65% of the total
   number of leukocytes. -- Neu"tro*phil"ic, a.,
   Neu*troph"i*lous, a.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

neutrophil
    n 1: the chief phagocytic leukocyte; stains with either basic or
         acid dyes [syn: neutrophil, neutrophile]