Definition that contains orc
- overture orchestral music played at the beginning of an opera or oratorio
- chatterbox orchid growing along streams or ponds of western North America having leafy stems and 1 greenish-brown and pinkish flower in the axil of each upper leaf
- catasetum macrocarpum orchid having both male and female flowers in the same raceme; when a sensitive projection at the base of the column of the male flower is touched the pollen is suddenly ejected
- spiranthes romanzoffiana orchid having dense clusters of gently spiraling creamy white flowers with 2 upper petals forming a hood; western North America
- stream orchid orchid growing along streams or ponds of western North America having leafy stems and 1 greenish-brown and pinkish flower in the axil of each upper leaf
- psychopsis krameriana orchid of South and Central America having flowers similar to but smaller than Psychopsis papilio; sometimes placed in genus Oncidium
- cleistes divaricata orchid of northeastern United States with magenta-pink flowers having funnel-shaped lip; sometimes placed in genus Pogonia
- habenaria dilatata orchid with spikes of many fragrant white flowers on erect leafy stems; of wet or boggy ground through most of the West and northern North America
- pogonia rosea orchid of central and northern South America having 1- to 3-blossomed racemes of large showy rose-colored flowers; sometimes placed in genus Pogonia
- encyclia tampensis orchid of Florida and the Bahamas having showy brightly colored flowers; sometimes placed in genus Epidendrum