A cornflower, a plant that grows in grain fields, Centaurea cyanus, with blue flowers resembling bottles.
Any of various large papilionid butterflies of the genus Graphium, also called triangles, etc.
Any of various blowflies of the genus Calliphora that have an iridescent metallic-blue body and make a loud buzzing noise when flying.
A blue ant, Diamma bicolor, a parasitic wasp native to Australia.
A police officer.
A marine jellyfish of the genus Physalia, which includes Physalia physalis, the Portuguese man-of-war, and Physalia utriculus, the Pacific man-of-war; a man-of-war.
Cichorium intybus, a somewhat woody perennial herbaceous plant of the dandelion family, many varieties of which are cultivated for salad leaves.