Definition of Sirenia in English:

Sirenia

Syllabification: Si·re·ni·a
Pronunciation: /sīˈrēnēə
 
/
Zoology
  • An order of large aquatic plant-eating mammals that includes the manatees and dugong. They live chiefly in tropical coastal waters and are distinguished by paddlelike forelimbs and a tail flipper replacing hind limbs.
    • Order Sirenia: two families and four living species
    More example sentences
    • Belonging to the order Sirenia, dugongs are believed to have given rise to the mermaid myth.
    • Marine mammals are divided into three orders: Carnivora, Sirenia and Cetacea.
    • Dugongs belong to the mammalian order Sirenia and are popularly known as sea-cows.

Origin

modern Latin (see siren).

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