[ˈzɔndəfe:la]
A synonym (e.g. in Maas's Textkritik) for Eigenfehler. The German word is derived from the verb sondern 'to separate' and Fehler 'error'. See lectio singularis.
Reference
– Maas, Paul. 1960. Textkritik. 4th ed. Leipzig: Teubner. – 1st ed. 1927.