bluebottle

[ bloo-bot-l ]
/ ˈbluˌbɒt l /
|

noun

a composite plant, Centaurea cyanus, having narrow leaves and blue flower heads.
Australian. Portuguese man-of-war.

Origin of bluebottle

First recorded in 1545–55; blue + bottle1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for bluebottle

bluebottle

/ (ˈbluːˌbɒtəl) /

noun

another name for the blowfly
any of various blue-flowered plants, esp the cornflower
British an informal word for a policeman
Australian and NZ an informal name for Portuguese man-of-war
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012