The unglossed primary headword -- probably extracted from the quotation given -- is the participle, masculine nominative plural, of the verb de/dia (delta 147); the secondary one, glossed, is the same in the masculine nominative singular.
Besides delta 147, see also e.g. delta 148, delta 302, delta 305.
[1] Quotation not identified by Adler but identifiable via the TLG as Procopius, History of the Wars of Justinian 6.28.32 (web address 1); cf. Kaldellis (377). In late 539 CE, the Ostrogothic military commander Uraïa (cf. PLRE IIIb s.v. Vraias) abandons his advance toward Ravenna (cf. rho 4) when his Ligurian troops learn that the Gothic garrisons in their homeland have surrendered to the Romans. On Liguria, the region around present-day Genoa in northeastern Italy, see alpha 1407 note.