1. any of several flies of the genus Calliphora that have a bright metallic-blue body and breed in decaying organic matter.

1. any of various blowflies of the genus Calliphora that have an iridescent metallic-blue body and make a loud buzzing noise whilst flying.
2. any of various marine creatures of the order Physalia, such as Physalia physalis, the portuguese man-of-war.
3. centaurea cyanus, a plant that grows in grain fields, with blue flowers resembling bottles.

1. 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. A large and troublesome species of blowfly (musca vomitoria). its body is steel blue.

1. in bot., centaurea Cyanus, a composite plant, a weed in europe, cultivated for ornament in america. also called bluebonnet and bluecap.
2. in zoology, a dipterous insect with a blue abdomen, of the family Muscidæ and genus musca, or Calliphora. also popularly called beef-eater and blue flesh-fly.
3. A policeman, a beadle, or other officer wearing a blue dress.
4. plural the grape-hyacinth, muscari botryoides and M. racemosum. see muscari.

1. an annual eurasian plant cultivated in north america having showy heads of blue or purple or pink or white flowers
2. blowfly with iridescent blue body; makes a loud buzzing noise in flight