The headword noun kubisthth/r is nominative singular. The content of the entry probably comes from commentary to Homer, where the word appears in other forms: Odyssey 4.18, Iliad 18.605 (nominative dual), Iliad 16.750 (nominative plural); and/or from commentary on Plato, Symposium 190A, where two forms of the related verb kubista/w ('I tumble', kappa 2598) appear; cf. scholia ad locc. and note 1 below. See also alpha 3984, omicron 670, chi 398, where the headword appears as a gloss.
[1] The glossing term is apparently a mistake for o)rxhsth/r ('dancer'); cf. generally Hesychius kappa4378, ps.-Zonaras 1262.26.
[2] This word is attested only here and, according to Adler, in the Laurentian lexicon.