• Webster's Revised Unabridged Dictionary
    • n Ventriculite (Paleon) Any one of numerous species of siliceous fossil sponges belonging to Ventriculites and allied genera, characteristic of the Cretaceous period.☞ Many of them were shaped like vases, others like mushrooms. They belong to the hexactinellids, and are allied to the Venus's basket of modern seas.
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Century Dictionary and Cyclopedia
    • n ventriculite A fossil sponge of the family Ventriculitidæ a so-called “petrified mushroom.” They are of various shapes—fungiform, cup-like, tubular, or funnel-shaped—and abound in the Cretaceous.
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Chambers's Twentieth Century Dictionary
    • n Ventriculite ven-trik′ū-līt one of a genus of fossil sponges found in the cretaceous system, and often giving their shape to flint nodules.
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Webster's Revised Unabridged Dictionary
See Ventriculus