sirenia defined in 1951 yearsirenia - sirenia;
sirenia - Manatees, dugongs, seacows. An order of placental mammals. Aquatic (coastal) with transversely expanded tail, front legs as flippers, hind legs vestigial; vegetarian. Not closely related to whales (Cetacea) in spite of many similarities.
near sirenia in Knolik
definition of word "sirenia" was readed 839 times