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sirenian

[sahy-ree-nee-uh n] /saɪˈri ni ən/
noun
1.
an aquatic, herbivorous mammal of the order Sirenia, including the manatee and dugong.
Origin of sirenian
1880-1885
1880-85; < New Latin Sireni(a) (see siren, -ia) + -an
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for sirenian

sirenian

/saɪˈriːnɪən/
adjective
1.
of, relating to, or belonging to the Sirenia, an order of aquatic herbivorous placental mammals having forelimbs modified as paddles, no hind limbs, and a horizontally flattened tail: contains only the dugong and manatees
noun
2.
any animal belonging to the order Sirenia; a sea cow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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