emerald

noun

• 1a bright green precious stone consisting of a chromium-rich variety of beryl: [as modifier]:an emerald necklace

• 2 [mass noun] (also emerald green) a bright green colour:the sea glistened in shades of emerald and jade

• 3 (also emerald moth) a slender-bodied green moth, the colour of which tends to fade as the moth ages.

  • Several genera in the family Geometridae

• 4a hawker dragonfly with a metallic green body.

  • Cordulia and other genera, family Corduliidae

• 5a small hummingbird with bright metallic green plumage and darker wings and tail, found mainly in the area of the Caribbean and Central America.

  • Three genera, in particular Chlorostilbon and Amazilia, family Trochilidae: numerous species

adjective

• bright green in colour:beyond the airport lay emerald hills