| twayblade | (n) orchid having a pair of ovate leaves and a long slender raceme of green flowers sometimes tinged red-brown; Europe to central Asia, Syn. Listera ovata |
| twayblade | (n) an orchid of the genus Liparis having a pair of leaves |
| Twayblade | n. (Bot.) Any one of several orchidaceous plants which have only two leaves, as the species of |