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Definition of Bladder
1. Noun. A distensible membranous sac (usually containing liquid or gas).
Exact synonyms: Vesica
Specialized synonyms: Gall Bladder, Gallbladder, Urinary Bladder
Generic synonyms: Sac
Derivative terms: Bladdery, Vesical
Specialized synonyms: Gall Bladder, Gallbladder, Urinary Bladder
Generic synonyms: Sac
Derivative terms: Bladdery, Vesical
2. Noun. A bag that fills with air.
Definition of Bladder
1. n. A bag or sac in animals, which serves as the receptacle of some fluid; as, the urinary bladder; the gall bladder; -- applied especially to the urinary bladder, either within the animal, or when taken out and inflated with air.
2. v. t. To swell out like a bladder with air; to inflate.
Definition of Bladder
1. a saclike receptacle [n -S] : BLADDERY [adj]
Medical Definition of Bladder
1. A membranous sac that serves as a reservoir for urine. Contraction of the bladder results in urination. (27 Sep 1997)