noun
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the hollow muscular organ located behind the sternum and between the lungs which by its rhythmic contractions moves the blood through the body; the heart.
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the part of the human body thought of as containing the heart; breast; the bosom.
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the human heart considered as the centrJ or source of emotions, personality attributes, etc.
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any of the noble qualities as kindliness, sympathy, compassion, benevolence, generosity, etc.
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the essential part of anything.
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a guarded secret.