crustacean

noun

1. Any arthropod of the subphylum Crustacea, including lobsters, crabs, shrimp, barnacles and woodlice.
2. Any arthropod of the clade Pancrustacea, which includes hexapods in addition to traditional crustaceans.

adj

1. Of, relating to, or characteristic of the subphylum Crustacea.

   “In cooperation with the Bureau of Fisheries he made several motion pictures of crustacean life.”

   “It is feared that any major change in its chemistry will render many of these species extinct. Likewise, if the temperature is raised by factory discharge, predators now kept out of the lake by its frigidity will invade and annihilate many of the hundreds of crustacean varieties peculiar to its waters.”

   “Judging from the graphic evidence of crustacean carnage all around, it's a safe guess as to who's ahead in the ancient battle between hardshell and Homo sapiens.”