[si.re.ni.an] n [NL Sirenia, fr. L siren] (1883): any of an order (Sirenia) of aquatic herbivorous mammals including the manatee, dugong, and Steller's sea cow
SIRENIAN
Meaning of SIRENIAN in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012