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bladder
noun
- a bag consisting of or lined with membranous tissue in the body of many animals, capable of inflation to receive and contain liquids or gases; esp. the urinary bladder in the pelvic cavity, which holds urine flowing from the kidneys
- a thing resembling such a bag, as the inflatable rubber bag inside the leather cover of a football
- an inflated covering of certain fruits
- an air sac, as in some water plants
See bladder in American Heritage Dictionary 4
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