blad·der 
/ˈblædɚ/ noun
plural blad·ders /ˈblædɚ/ noun [count] 1 : the organ in the body that holds urine after it passes through the kidneys and before it leaves the body — see picture at human; see also gallbladder 2 : a soft bag (such as the rubber bag inside a football) that is filled with water or air
