Describing something that has been plunged or immersed beneath a liquid surface, especially used in botany for aquatic plants.
Past participle of demerse. In botanical terminology, demersed plants are those that grow entirely underwater, coined to distinguish them from emergent or floating plants.
Aquatic botanists use 'demersed' to describe plants like pondweeds that live their entire lives underwater—it's a specialized term that reveals how scientists needed precise language to categorize different plant lifestyles in water.
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