Entomology definition of Fissure September 8, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Fissure Entomology definition of Fissure: a crevice: a narrow longitudinal opening: a slit. Entomology Fissure definitionFissure Entomology explanationFissure Entomology meaningReviews & Comments