The Etymologicum Genuinum (standard abbreviation E Gen or EtGen) is the conventional modern title given to a lexical encyclopedia compiled at Constantinople in the mid-ninth century.
The anonymous compiler drew on the works of numerous earlier lexicographers and scholiasts, both ancient and recent, including Aelius Herodianus, Georgius Choeroboscus, Saint Methodius, Orion of Thebes, Oros of Alexandria and Theognostus the Grammarian.
[3] The Etymologicum Genuinum remains for the most part unpublished except for specimen glosses.
[4] Two editions are in long-term preparation, one begun by Ada Adler and continued by Klaus Alpers,[5] the other by François Lasserre and Nikolaos Livadaras.
[6] The latter edition is published under the title Etymologicum Magnum Genuinum, but this designation is not widely used and is a potential source of confusion with the twelfth-century lexical compendium conventionally titled the Etymologicum Magnum.