n. plMacrura(Zoöl) A subdivision of decapod Crustacea, having the abdomen largely developed. It includes the lobster, prawn, shrimp, and many similar forms. Cf. Decapoda.
Century Dictionary and Cyclopedia
nmacruraA subordinal or superfamily group of stalk-eyed thoracostracous crustaceans of the order Decapoda, containing those which are long-tailed, as the lobster, crawfish, prawn, shrimp, etc.: distinguished from Brachyura and Anomura. The abdomen is long, muscular, flexible, and covered with a hard, segmented shell; it bears usually six pairs of appendages, the last modified into a caudal fin or swimming-tail. Both pairs of feelers are long and filiform; the inner pair are always exserted, and the outer have often a modified exopodite as an appendage at the base. Also spelled Macroura.