Πυανοψιών
From LSJ
γραμματική ἐστιν ἐμπειρία τῶν παρὰ ποιηταῖς τε καὶ συγγραφεῦσιν ὡς ἐπὶ τὸ πολὺ λεγομένων → grammar is a practical knowledge of the usage of poets and writers of prose
English (LSJ)
ῶνος, ὁ, the fourth month of the Att. year, named from the festival Πυανόψια, corresponding to the latter part of October and former of November, IG12.6.64, 22.1014.4, etc.; also at Priene, Miletus, etc., SIG282.19 (iv B.C.), 588.90 (ii B.C.), etc.: freq. written Πυανεψιών, Thphr.HP4.2.10, etc.; but not in Att. Inscrr. (exc. Ποιανεψιών IG22.2239.82 (iii A.D.)); cf. Κυανοψιών.