[1] The headword (which has the same or similar glossing in other lexica, beginning with Hesychius) is masculine/feminine nominative plural of this adjective. It might be generated by the dative plural in the quotation given, but there is no particular reason to think so, as the other lexica do not have the quotation. If not, the likeliest noun presupposed by the adjective is logoi; cf. LSJ s.v.
[2] Quotation (and individual) unidentifiable.