bluebottle

• POS: Noun
• HYPHEN: blue=bot=tle

CIDE DICTIONARY

bluebottle, n. 

•  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  [1913 Webster]
•  A large and troublesome species of blowfly (Musca vomitoria). Its body is steel blue.  [1913 Webster]

OXFORD DICTIONARY

bluebottle, n.
1 a large buzzing fly, Calliphora vomitoria, with a metallic-blue body. Also called BLOWFLY.
2 Austral. a Portuguese man-of-war.
3 a dark blue cornflower.
4 Brit. colloq. a policeman.