air vesicle

American  

noun

Botany.

1. a large, air-filled pocket, chiefly in plants that float on water, as kelps.

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air vesicle British  

noun

1. a large air-filled intercellular space in some aquatic plants

2. a large intercellular space in a leaf into which a stoma opens

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air vesicle Scientific  

1. See float

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