Definition of "ascidium" []

• Botany A pitcher-shaped or bottle-shaped part or organ, such as the hollow tubular leaf of a pitcher plant. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "It is not in all cases easy to trace the origin and true nature of the ascidium, as the venation is sometimes obscure."
• "It appeared from some transitional forms that the adventitious leaflet, just mentioned, was due to the exaggerated development of this gland, but no clue was afforded as to the origin of the ascidium."
• "The more distant the [671] lobes, the deeper the ascidium will become."