Blue"bot`tle (&?;), n. 1. (Bot.) A plant (Centaurea cyanus) which grows in grain fields. It receives its name from its blue bottle-shaped flowers.
2. (Zoöl.) A large and troublesome species of blowfly (Musca vomitoria). Its body is steel blue.
Blue"breast` (&?;), n. (Zoöl.) A small European bird; the blue-throated warbler.
Blue"cap` (&?;), n. 1. (Zoöl.) (a) The bluepoll. (b) The blue bonnet or blue titmouse.