pneu·mat·o·phore /nʊˈmætəˌfor, njʊ, ˌfɔr/
氣腔;呼吸根
Pneu·mat·o·phore n. Zool. One of the Pneumonophora.
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pneumatophore
n : an air-filled root (submerged or exposed) that can function
as a respiratory organ of a marsh or swamp plant