Webster's 1828 Dictionary
RINGENT
a.[L. ringor, to make wry faces, that is, to wring or twist. ] In botany, a ringent or labiate corol is one which is irregular, monopetalous, with the border usually divided into two parts called the upper and lower lip; or irregular and gaping, like the mouth of an animal.
Webster's 1913 Dictionary
RINGENT
Rin "gent, a. Etym: [L. ringens, -entis, p. pr. of ringi to open wide the mouth: cf. F. ringent. ] (Bot. )
Defn: Having the lips widely separated and gaping like an open mouth; as a ringent bilabiate corolla.
The Wordsmith Dictionary