Same entry, according to Adler, in the Ambrosian Lexicon (437); see also Hesychius, ps.-Zonaras 1866, Etymologicum Magnum 816.40, and the scholia to the participle xow/menos in Homer, Iliad 1.244 (see chi 434).
The headword is the aorist middle infinitive of that verb, xw/omai, a verb frequent in Homer though not in this form. It is perhaps quoted here from its only extant occurrence outside lexica and grammars: Philostratus, Life of Apollonius of Tyana 4.10.