Any of various coastal crabs of the family Portunidae, having the hind pair of limbs modified into paddles for swimming; a swimming crab.
Of, relating to, or belonging to the family Portunidae.
Late 19th century; earliest use found in Isaac Funk (1839–1912), publisher and reformer. From scientific Latin Portunidae, family name (attributed to W. E. Leach in G. SamouelleEntomologist's Useful Compendium 83; compare earlier †Portunidia from Portunus, genus name + -idae. Compare French portunide, noun.