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| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
heart (härt)
n.
The chambered, muscular organ in vertebrates that pumps blood received from the veins into the arteries, thereby maintaining the flow of blood through the entire circulatory system.
A similarly functioning structure in invertebrates.
heart (härt) Pronunciation Key
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The hollow muscular organ that is the center of the circulatory system. The heart pumps blood throughout the intricate system of blood vessels in the body.
heart definition
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