D̦ (D-comma) is a letter that was part of the Romanian alphabet to represent the sound /z/ or /dz/ if it was derived from a Latin d (e.g. d̦i, pronounced /zi/ came from Latin die, day). It was the equivalent of the Cyrillic letters З and Ѕ. This letter was first introduced by Petru Maior in his 1819 book Ortographia romana sive Latino–Valachica, una cum clavis, qua penetralia originationis vocum reserantur...: "d̦ sicut Latinorum z ac cyrillicum з". In 1844, Ioan Eliade introduced d̦ again, in his magazine Curierul de ambe sexe, as a substitute for з.