An Eigenfehler (German for "(a witness's) own mistake") is an error or a variant in a text's tradition that occurs only in one witness – or possibly in witnesses from several places in the stemma independently – and can therefore be eliminated in the search of the archetypal text. Cf. eliminatio lectionum singularium.
In other languages
EN: (also:) singular reading
FR: leçon propre
IT: lezione singolare, cf. lectio singularis.