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Definition of abdomen
1 : the part of the body between the thorax and the pelvis also : the cavity of this part of the trunk containing the chief viscera
2 : the posterior section of the body behind the thorax in an arthropod — see insect illustration
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Merriam-Webster unabridgedWords at Play
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Time Traveler for abdomen
The first known use of abdomen was circa 1541
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