Definition of Sirenia in English:

Sirenia

plural noun

Zoology
  • An order of large aquatic plant-eating mammals which includes the manatees and dugong. They live chiefly in tropical coastal waters and are distinguished by paddle-like forelimbs and a tail flipper replacing hindlimbs.

    • ‘Dugongs belong to the mammalian order Sirenia and are popularly known as sea-cows.’
    • ‘Marine mammals are divided into three orders: Carnivora, Sirenia and Cetacea.’
    • ‘Belonging to the order Sirenia, dugongs are believed to have given rise to the mermaid myth.’

Origin

Modern Latin (see siren).

Pronunciation:

Sirenia

/sʌɪˈriːnɪə/