air bladder

English

Noun

air bladder (plural air bladders)

1. An internal organ that fish use to control their buoyancy, allowing them to maintain or change depth by changing their density.

   Synonyms: fish maw, gas bladder, swim bladder

2. A type of packing material that consists of an airtight bag full of air, used to cushion fragile items.
   • 2019 November 21, Samanth Subramanian, “How our home delivery habit reshaped the world”, in The Guardian‎^[1]:

     The company used to be notorious for excessive packaging, and social media grew littered with examples: three pairs of socks wrapped in puffy air bladders […]

Translations

swim bladder — see swim bladder