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Webster 1913 Edition

Noun.

(Bot.)

A genus (

Utricularia

) of aquatic or marshy plants, which usually bear numerous vesicles in the divisions of the leaves. These serve as traps for minute animals. See

bladderwort ‎(usually uncountable, plural bladderworts)

Any of many aquatic carnivorous plants, of the genus Utricularia, that have open bladders that trap minute insects and crustaceans.

Utricularia