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monocardian
monocardian (ˌmɒnəʊˈkɑːdɪən) biologyn (Biology) a creature that has only one heartadj (Biology) having only one heartmonocardian
mon·o·car·di·an (mon'ō-kar'dē-ăn), Having a heart with a single atrium and ventricle.monocardian (mŏn-ō-kăr′dē-ăn) [″ + kardia, heart] An animal possessing a heart with only one atrium and one ventricle. |