Entry 1 sense Webster, 1913 steller /stĕl'-ẽr/ · stel·ler · IPA /ˈstɛləɹ/ 01 n. The rytina; -- called also stellerine and Steller's sea cow. See rytina. 1. The rytina; -- called also stellerine and Steller's sea cow. See rytina.(Zool.) Also: stellerine, Steller's sea cow See: rytina