• (n.) See Rytina.
Synonym for rytina ... <zoology> A genus of large edentulous sirenians, allied to the dugong and manatee, including but one species (R. Stelleri). ... Synonym: Steller's sea cow. ... Alternative forms: Rhytina. ... It is now extinct, but was formerly abundant at Behring's Island, near Behring's Straits. It was twenty-five feet or more in leng...
Rhyt'i·na noun (Zoology) See Rytina . 
The Rhytina are a genus of mammals, closely allied to the manatee and dugong. The Rhytina were discovered in 1741 on an island in the Berring Straits.
Rhytina The Steller's sea cow; including: the mantee, dugong, and walrus.