from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A taxonomic order within the subclass Placentalia — the sirenians.
from the GNU version of the Collaborative International Dictionary of English
- n.pl. An order of large aquatic herbivorous mammals, including the manatee, dugong, rytina, and several fossil genera.
from The Century Dictionary and Cyclopedia
- n. The sirenian mammals or so-called herbivorous cetaceans, an order of educabilian placental Mammalia, having the body fish-like in form, with the hind limbs and pelvis more or less completely atrophied, and the body ending in a horizontal expansive tail, either rounded or like the flukes of a cetacean.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an animal order including: manatees; dugongs; Steller's sea cow
Named for the legendary siren, originating in Greek mythology. (Wiktionary)