E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Letters like wedges (Latin, cuneus, a wedge). These sort of letters occur in old Persian and Babylonian inscriptions. They are some-times called Arrow-headed characters, and those found at Babylon are called nail-headed. This species of writing is the most ancient of which we have any knowledge; and was first really deciphered by Grotefend in 1802.