ˈn(y)üməd.əˌfō(ə)r, n(y)üˈmad.əˌ- noun
( -s )
Etymology: International Scientific Vocabulary pneumat- + -phore
1. : a muscular gas-containing sac that serves as a float on a siphonophore colony (as of members of the genus Physalia )
2. : a submerged or exposed root often functioning as a respiratory organ of a swamp or marsh plant