Definition of Pinnipedia in US English:

Pinnipedia

plural noun

Zoology
  • An order of carnivorous aquatic mammals that comprises the seals, sea lions, and walrus. They are distinguished by their flipperlike limbs.

    Order Pinnipedia: three families

    • ‘The seals (Pinnipedia) have three extant families: Odobenidae, Otariidae (fur seals), and Phocidae (including gray seal and harbor seal).’
    • ‘Within Pinnipedia, the closer affinity of Otariidae to either Phocidae or Obodenidae has long been debated.’
    • ‘Some authorities, however, consider the pinnipeds to be monophyletic and basal to all living carnivores (feliform and caniform), and place it in a separate order, the Pinnipedia.’

Origin

Modern Latin (plural), from Latin pinna ‘wing, fin’ + pes, ped- foot.

Pronunciation

Pinnipedia

/ˌpinəˈpēdēa/