'Greenhood' definitions:

Definition of 'greenhood'

(from WordNet)
noun
Any of numerous orchids of the genus Pterostylis having leaves in a basal rosette and green flowers often striped purple or brown or red with the dorsal sepal incurved to form a hood [syn: helmet orchid, greenhood]

Definition of 'Greenhood'

From: GCIDE
  • Greenhead \Green"head\, Greenhood \Green"hood\, n. A state of greenness; verdancy. --Chaucer. [1913 Webster]