Entomology definition of Crustaceous September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Crustaceous Entomology definition of Crustaceous: hard, like the shell of a crab. Crustaceous Entomology explanationCrustaceous Entomology meaningEntomology Crustaceous definitionReviews & Comments