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

The most common answer is pneumatophore (13 letters).

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

pneumatophore 13 letters wn-def

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