Bluebottle
Bluebottle ({not transcribed}) , noun
1.
(Botany) an annual Eurasian plant (Centaurea cyanus) which grows in grain fields; -- called also bachelor's button. It receives its name from its blue bottle-shaped flowers. Varieties cultivated in North America have showy heads of blue or purple or pink or white flowers
2.
(Zoology) A large and troublesome species of blowfly (Musca vomitoria). Its body is steel blue.
Also: blue-bottle