= Synagoge epsilon394 (= Lexica Segueriana 202.23) and Photius, Lexicon delta805; cf. Hesychius delta2547 (relating to 3 Maccabees 6.31 LXX).
This adjective -- here in either the masculine/feminine accusative singular or the neuter nominative accusative singular -- occurs in few writers (and commentaries): scholia in Aristotelis Ethica Nicomachea 1126A.25 (also recorded in Aspasius, Commentaria 120.17), Leo Choerosphractes (see below), Basil of Caesarea. Also in Ammonius and Herennius, quoted by Eustathius, perhaps via Lexicon Gudianum, as adverbial form in -tws.
The main meaning is always the one indicated in the present translation, in accordance with LSJ s.v. The passage in Leo Choerosphractes, Chiliostichos theologia 11.12 (kai\ ti/s prosoi/sei dusdia/llakton ma/xhn), if interpreted 'and who will bring a most mournful battle', could be the only extant instance of dusdia/llaktos applied to the meaning of the gloss. In any event, a more likely explanation is to be found in a textual confusion between the headword here, dusdia/llaktos, and dusai/aktos (which is the headword of delta 1608 and is glossed there with a form of the same word). This is all the more likely given the close similarity of the characters (*D*U*S*D*I*A- vs. *D*U*S*A*I*A-). Dindorf (followed by Theodoridis in his Photius edition), obelizes the glossing word on this basis, but one might just as easily condemn the whole entry as a garbled doublet of epsilon 1608.
[1] This gloss is an adjective (again at delta 1608) taken from tragedy, where it occurs twice: Sophocles, Antigone 1211, and Euripides, Iphigenia in Tauris 144; from qrh=nos 'lament', a funeral ritual, of which we have many examples from Homer onwards. As a lyric composition, the qrh=nos was developed by Simonides and Pindar and, later, in tragedy, where it acquired an important function.