• Webster's Revised Unabridged Dictionary
    • a Ringent (Bot) Having the lips widely separated and gaping like an open mouth; as a ringent bilabiate corolla.
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Century Dictionary and Cyclopedia
    • ringent In botany, gaping: noting a bilabiate corolla with the lips widely spread and the throat open, as in the dead-nettle, Lamium.
    • ringent In zoology, gaping irregularly, as parts of some zoöphytes and the valves of some shells.
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Chambers's Twentieth Century Dictionary
    • adj Ringent rin′jent gaping.
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Webster's Revised Unabridged Dictionary
L. ringens, -entis, p. pr. of ringi, to open wide the mouth: cf. F. ringent,


In literature:

From the arching of the upper lip this corolla is called ringent.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5" by Various
Flower (in ours) ringent and spurred, spicate upon a leafy stem.
"The Manual of the Botany of the Northern United States" by Asa Gray