biauriculate heart

Thesaurus

Noun

1.biauriculate heart - a heart (as of mammals and birds and reptiles) having two auriclesmammal, mammalian - any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milkticker, heart, pump - the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body; "he stood still, his heart thumping wildly"