ringent

Latin ringens, from the verb ringi (“to open wide”).

ringent

1. Having the semblance of lips parted wide, such as may be observed in certain flowers.
   • 1979, Cormac McCarthy, Suttree, Random House, page 107:

     Ringent pools of gas kept erupting in oily eyes on the surface.

• rictus

• “ringent”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• entring, renting