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pneu•mat•o•phore(nʊˈmæt əˌfɔr, -ˌfoʊr, nyʊ-)
1. a specialized structure developed from the root in certain plants growing in swamps and marshes, serving as a respiratory organ.
2. the air sac of a siphonophore, serving as a float.
pneu•ma•toph•or•ous (ˌnu məˈtɒf ər əs, ˌnyu-) adj.
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