Any of various aquatic insects and crustaceans having limbs that are oar-shaped and adapted for swimming. Now: specifically any of several small primitive crustaceans constituting the class Remipedia, which are found in marine caves and have wormlike segmented bodies, each segment bearing a pair of biramous swimming limbs.
Originally known only as a fossil, the first living members of the Remipedia were discovered in 1979.
Of an aquatic insect or crustacean: having limbs that are oar-shaped and adapted for swimming. Now: specifically of or relating to the class Remipedia of crustaceans.
Early 19th century; earliest use found in William Kirby (1759–1850), entomologist and naturalist. From French rémipède from classical Latin rēmipedus oar-footed (as epithet of web-footed birds, in a solitary attestation) from rēmus oar + pēd-, pēs foot.