A human image with the bladder highlighted.
An example of the bladder is the part of the body that feels full when one needs to urinate.
- 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 of bladderMiddle English bladre ; from Old English blæddre ; from Indo-European an unverified form bhl?-: see blast
- 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. Medicine A blister, pustule, or cyst filled with fluid or air; a vesicle.c. An item resembling one of the membranous sacs in animals: the bladder of a buoyancy compensator.
- Botany Any of various hollow or inflated saclike organs or structures, such as the floats of certain seaweeds or the specialized traps of bladderworts.
Origin of bladderMiddle English bladdre, from Old English bl&aemac;dre; see bhlē- in Indo-European roots.
- (zoology) A flexible sac that can expand and contract and that holds liquids or gases.
- (anatomy) Specifically, the urinary bladder.
- (botany) A hollow, inflatable organ of a plant.
- The inflatable bag inside various balls used in sports, such as footballs and rugby balls.
- A sealed plastic bag that contains wine and is usually packaged in a cask.
- (figuratively) Anything inflated, empty, or unsound.
(third-person singular simple present bladders, present participle bladdering, simple past and past participle bladdered)
Akin to Old High German platara (German Blatter) and Old Norse blaðra (Danish blære).