swim bladder

noun

1. air bladder ( def 2 ).

swim bladder

noun

1. ichthyol another name for air bladder

Word History and Origins

Origin of swim bladder¹

First recorded in 1830–40

Example Sentences

The needless lung becomes a closed sac filled with air, and commonly known as the swim bladder.

From Project Gutenberg

Sometimes, as the need of the theory demands, the swim-bladder is claimed as the relic of a discarded lung.

From Project Gutenberg

Thus the swim-bladder of the fish became, it is supposed, the lung of the terrestrial animal.

From Project Gutenberg

But in reality it has no gills and no swim-bladder; it lays no eggs; it does not own one truly fish-like organ.

From Project Gutenberg

It corresponds with the swim bladder of most modern fishes, and appears to have had a common origin with it.

From Project Gutenberg