Swim-Bladder is a 12 letter English word. It's valid Scrabble word worth 9 points. It's valid Words with friends word worth 10 points.
You can make 1210 anagrams from letters in swim-bladder (-abddeilmrsw).
First recorded in 1830-40
It corresponds with the swim bladder of most modern fishes, and appears to have had a common origin with it.
The known part of the route from an arboreal ancestor with a swim bladder to an urban descendant with a cigarette.
The needless lung becomes a closed sac filled with air, and commonly known as the swim bladder.