For this headword see already epsilon 1916. Here, in an entry taken over from Photius, it is in the nominative plural, and so (one might naturally suppose) quoted from somewhere. But in fact, as David Ruhnken realised, the headword should be ei)saggeli/ai, "impeachments" (cf. epsiloniota 220, epsiloniota 221, epsiloniota 222), the term for which Timaeus' Platonic Lexicon supplies the present definition. It is very probably quoted from Plato, Republic 8.565C; cf. the scholia there.
[1] Adler notes that Aemilius Portus emended this participle to w(risme/nai, "defined".