名詞 pneumatophore:

1. an air-filled root (submerged or exposed) that can function as a respiratory organ of a marsh or swamp plant

pneu.mat.o.phore

n.（名詞）
A gas-filled sac serving as a float in some colonial marine hydrozoans, such as the Portuguese man-of-war.
氣囊，浮囊：在某些群居的海生水螅綱動物中，用作漂浮物的一種充氣小囊，如葡萄牙的僧帽水母的浮囊
Botany A specialized respiratory root structure in certain aquatic plants, such as the bald cypress.
【植物學】 呼吸根，載氣體：在某些水生植物中的一種特殊的起呼吸作用的根結(jié)構(gòu)，如落羽松

【引伸】
pneumat.ophor.ic