1. cornflower, bachelor's button, bluebottle, Centaurea cyanus, flower

usage: an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers

2. bluebottle, Calliphora vicina, blowfly, blow fly

usage: blowfly with iridescent blue body; makes a loud buzzing noise in flight

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See also: bluebottle (Dictionary)