• Webster's Revised Unabridged Dictionary
    • n Zaphrentis (Paleon) An extinct genus of cyathophylloid corals common in the Paleozoic formations. It is cup-shaped with numerous septa, and with a deep pit in one side of the cup.
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Century Dictionary and Cyclopedia
    • n zaphrentis The typical genus of Zaphrentinæ. The species are deeply cupped, with many septa, and a peculiar pit on one side of the interior. Z. cassedayi is an example. They lived in the Silurian and Carboniferous periods.
    • n zaphrentis [l. c] A species of this genus.
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Webster's Revised Unabridged Dictionary