any of a class (Branchiopoda) of crustaceans with many pairs of flattened, leaflike limbs, as the fairy shrimps and water fleas
See branchiopod in American Heritage Dictionary 4
(brăngˈkē-ə-pŏdˌ)
noun
Any of various aquatic crustaceans of the class Branchiopoda, such as the fairy shrimp and water flea, characterized by a segmented body and flattened, leaflike thoracic appendages.