Tetragram or tetragraph generally refers to any a group of four letters, but more specifically may refer to: * Tetragraph, in orthography, referring to a sequence of four letters that represent sounds not necessarily corresponding to those of the individual letters * Tetragrammaton, a Hebrew name for God written as YHWH * Complete quadrilateral, a geometric system of four lines and their six points of intersection * Tetragraph (from Chinese zh, c=方塊字, p=fāngkuàizì, labels=no), referring to Chinese characters written on squared graph paper * A symbol with four lines in Taixuanjing * A degenerate star polygon, usually represented as a compound of two digons

See also