/'blædə(r); `blædɚ/
n
1 bag made of membrane in which urine collects in human and animal bodies 膀胱.
2 similar bag that can be inflated for various uses (eg the rubber lining of a football) （任何可充气的）囊状物（如足球内的橡皮球胆）.

n[C]
[Language: Old English;Origin: blAdre]
the organ in your body that holds urine (=waste liquid) until it is passed out of your body
a bag of skin, leather, or rubber, for example inside a football, that can be filled with air or liquid
→gall bladder