pin·ni·ped (pĭn'ə-pěd') adj. Of or belonging to the Pinnipedia, a suborder of carnivorous aquatic mammals that includes the seals, walruses, and similar animals having finlike flippers as organs of locomotion. n. A mammal of the suborder Pinnipedia.
[From New Latin Pinnipedia, order name : Latin pinna, feather; see pinna + Latin pēs, ped-, foot; see -ped.]
1842, from Mod.L. pinnipedia, suborder of aquatic carnivorous mammals (seals and walruses), lit. "having feet as fins," from L. pinna "fin" + pes, gen. pedis "foot" (see foot).