The Collaborative International Dictionary
Musca vomitoria
Bluebottle \Blue"bot`tle\, blue-bottle \blue-bottle\, n.
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(Bot.) 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
Syn: cornflower, bachelor's button.
(Zo["o]l.) A large and troublesome species of blowfly ( Musca vomitoria). Its body is steel blue.