- The bladder is defined as a bag in the body to hold urine, or something resembling this bag.
An example of the bladder is the part of the body that feels full when one needs to urinate.
A human image with the bladder highlighted.Licensed from iStockPhoto
- 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
Origin: Middle English bladre ; from Old English blæddre ; from Indo-European an unverified form bhlē-: see blast
Used by arrangement with John Wiley & Sons, Inc.
- a. Anatomy Any of various distensible membranous sacs, such as the urinary bladder or the swim bladder, that serve as receptacles for fluid or gas.b. An item resembling one of the membranous sacs in animals: the bladder of a football.
- Botany Any of various hollow or inflated saclike organs or structures, such as the floats of certain seaweeds or the specialized traps of bladderworts.
- Pathology A blister, pustule, or cyst filled with fluid or air; a vesicle.
Origin: Middle English bladdre, from Old English blǣdre; see bhlē- in Indo-European roots.
bladder - Cultural Definition
bladder - Medical Definition
- Any of various distensible membranous sacs, such as the urinary bladder, that serve as receptacles for fluid or gas.
- A blister, pustule, or cyst filled with fluid or air; vesicle.
bladder - Science Definition
- A sac-shaped muscular organ that stores the urine secreted by the kidneys, found in all vertebrates except birds and the monotremes. In mammals, urine is carried from the kidneys to the bladder by the ureters and is later discharged from the body through the urethra.
- An air bladder.
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