Definitions

1. adjective

relating to or resembling crustaceans, such as crabs, lobsters, or shrimp

“The crustaceous creatures inhabited the ocean floor.”

2. noun

a person who is fond of or skilled in the preparation and eating of crustaceans, especially crabs and lobsters

“He was a crustaceous by nature and enjoyed cooking seafood delicacies.”

3. noun

a part or section of something resembling a crustacean, such as a crustaceous shell or a crustaceous structure

“The engineer examined the crustaceous component of the mechanical device.”