A'dder's-tongue. n.s. [ophioglossum, Lat.] The name of an herb.
It hath no visible ﬂower; but the seeds are produced on a spike, which resembles a serpent's tongue; which seed is contained in many longitudinal cells, which open, and cast forth the seeds when ripe. It grows wild in moist meadows, and is used in medicine. Millar.
The most common simples with us in England, are comfrey, bugle, agrimony, sanicle, paul's-betony, fluellin, periwinkle, adder's-tongue. Wiseman's Surgery.