bladderwort: any of numerous aquatic carnivorous plants of the genus Utricularia some of whose leaves are modified as small urn-shaped bladders that trap minute aquatic animals
carnivorous plant: plants adapted to attract and capture and digest primarily insects but also other small animals
beta rhythm: the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz