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
asbestŏs: i, m. (sc. lapis), = ἄσβεστος (incombustible),
I a stone of an iron-gray color, found in Arcadia, differing from the common asbestos, perh. amiantus, Plin. 37, 10, 54, § 146.