Ƃ (minuscule: ƃ) is a letter of the Latin alphabet. It is similar to the CyrillicБ б in appearance. A very similar glyph has also sometimes been used for the uppercase form of Ɓ ɓ, for example in Shona.
In upside-down text, the letter in lowercase form is often used as a substitute for turned g (for its wider availability in fonts such as Verdana Ref and Georgia than other substitutes, such as the real Unicode turned-g and another substitute, Ɓ).