| broad-leaved twayblade | (n) small orchid with two elliptic leaves and a slender raceme of small green flowers; western North America, Syn. Listera convallarioides |
| lesser twayblade | (n) orchid having two triangular leaves and a short lax raceme of green to rust-colored flowers with the lip flushed mauve; Europe and Asia and North America and Greenland, Syn. Listera cordata |
| 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 |