Entomology definition of Crepuscular September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Crepuscular Entomology definition of Crepuscular: active or flying at dusk. Crepuscular Entomology explanationCrepuscular Entomology meaningEntomology Crepuscular definitionReviews & Comments