"bluebottle" in the noun sense
1. cornflower, bachelor's button, bluebottle, Centaurea cyanus
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 with iridescent blue body makes a loud buzzing noise in flight
Source: WordNet® (An amazing lexical database of English)
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