• Webster's Revised Unabridged Dictionary
    • Ascidium (Zoöl) 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.
    • Ascidium (Bot) 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).
    • ***
Century Dictionary and Cyclopedia
    • n ascidium [Also less prop. Ascidia.] A genus of tunicates, typical of the principal family of the class Ascidia, some of whose species are known as sea-squirts: synonymous with Phallusia.
    • n ascidium [lowercase; pl. ascidia (-ä).] In botany: Any tubular, horn-shaped, or pitcher-like formation, arising usually from the union of the margins of a leaf or other organ, or from the disproportionate growth of some part. The ascidium ordinarily known as a pitcher, as in the pitcher-plants (Nepenthes) and side-saddle flowers (Sarracenia), is often covered by a lid, and contains a secreted fluid in which insects are drowned and macerated. The small aquatic sacs of species of Utricularia are also ascidia. See cut in next column. Same as ascus, 1.
    • ***
Chambers's Twentieth Century Dictionary
    • n Ascidium a genus of Ascidians:
    • n Ascidium (bot.) a pitcher-shaped, leafy formation, as in the Nepenthes
    • ***


Webster's Revised Unabridged Dictionary
NL., fr. ascus,. See Ascus
Chambers's Twentieth Century Dictionary
Gr. askidion, dim. of askos, a leathern bag, wine-skin.