The bust bodice (sometimes shortened to B.B.) was a garment with straps, often lightly boned, which was designed to support the breasts. It was worn from the 1890s onwards and became particularly popular in Edwardian times.
The first brassieres were manufactured in America in 1914, but versions of the bust-bodice were still being worn in the 1920s.
Click here to see a bust bodice.