Same entry in ps.-Zonaras. The headword (extracted from the quotation given) and the gloss are present participles in the masculine accusative singular.
For the verb dusqanata/w see LSJ s.v.; it is not to be confused with dusqanate/w (which would give rise to the participle dusqanatou=nta), I die hard/struggle against death.
[1] Theophylact Simocatta, Histories 2.6.1 (probably via one of the lost books of Excerpta Constantini Porphyrogeniti), on a badly wounded Roman soldier at the Battle of Solachon (586 CE; cf. alpha 141 note); cf. de Boor (79), Whitby (50), and cross-references to related entries at alpha 141.