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Ascidium

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Ascidium

Origin: NL, fr. Ascus. See Ascus.

1. (Science: botany) a pitcher-shaped, or flask-shaped, organ or appendage of a plant, as the leaves of the pitcher plant, or the little bladderlike traps of the bladderwort (Utricularia).

2. (Science: zoology) a genus of simple ascidians, which formerly included most of the known species. It is sometimes used as a name for the ascidioidea, or for all the tunicata.