单词	Sirenia
释义	Sirenia /sʌɪˈriːnɪə / 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. Order Sirenia: two families and four living species. 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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