any chiefly aquatic arthropod of the class Crustacea, typically having the body covered with a hard shell or crust, including the lobsters, shrimps, crabs, barnacles, and wood lice.
Many insects, and especially certain crustaceans, show us what wonderful changes of structure can be effected during development.
Pressurized evolution accounts for the strange crustaceans and tubeworms found near thermal vents on the ocean floor.
Our extensive live collection demonstrates natural habitats of many unusual insects, arachnids and crustaceans.
Flamingoes, for instance, extract pink pigments from algae and crustaceans they filter out of the water.
Merchants sell fossilized insects, crustaceans and plants.
New laws around the world protect crustaceans' rights--and make it illegal to boil them alive.
The author was never a huge fan of the crustaceans--until she tried these lettuce and rice wraps.
New laws around the world protect crustaceans' rights--and make it illegal to boil them alive.
Ocean acidification is taking its toll on crustaceans--the bellwether species for changes in the water's pH balance.
The results show that around a fifth of the world's marine species are crustaceans such as crabs, lobsters, krill and barnacles.
British Dictionary definitions for crustaceans
crustacean
/krʌˈsteɪʃən/
noun
1.
any arthropod of the mainly aquatic class Crustacea, typically having a carapace hardened with lime and including the lobsters, crabs, shrimps, woodlice, barnacles, copepods, and water fleas
adjective
2.
of, relating to, or belonging to the Crustacea
Word Origin
C19: from New Latin crūstāceus hard-shelled, from Latin crūsta shell, crust
Word Origin and History for crustaceans
crustacean
n.
1835, from Crustacea the class name. As an adjective, 1858 (earlier was crustaceous, 1640s).
crustaceans in Science
crustacean
(krŭ-stā'shən) Any of various widespread arthropods of the class Crustacea that live mostly in water and have a hard shell, a segmented body, and jointed appendages. Crustaceans include crabs, lobsters, shrimp, barnacles, and copepods.