The Wörterbuch der äegyptischen Sprache (English: Dictionary of the Egyptian language) was a project by Adolf Erman and Hermann Grapow to publish a comprehensive dictionary of Old, Middle, and Late Egyptian and the hieroglyphic inscriptions of the Greco-Roman period. Undertaken from 1897 to 1961, the project centered mainly at the former Prussian Academy of Sciences in Berlin, and was therefore also known as the "Berlin Dictionary". With about 16,000 words it provides the most complete printed dictionary of Egyptian to date.