Lewis Short
(Adj.) : măgistra, ae, f.id.
* A mistress, superior, conductress, directress, etc.
* Lit (very rare): ludo magistra esse,school-mistress, instructress,Ter. Hec. 2, 1, 7.—A highpriestess, Inscr. Orell. 1501; 1519 sq.; 2427 sq.
* Trop., a directress, conductress, instructress: nunc ego ad vos discipulus venio ad magistras,Plaut. Stich. 1, 2, 32: vita rustica parsimoniae magistra est. Cic. Rosc. Am. 27, 75: philosophia magistra vitae,id. Tusc. 5, 2, 5: historia, magistra vitae,id. de Or. 2, 9, 36: lex quasi dux vitae et magistra officiorum,id. N. D. 1, 15, 40: frigus formicā quidam expavere magistrā,Juv. 6, 361: vita magistra,id. 13, 22: arte magistrā,with the aid of art,Verg. A. 8, 442: pietate magistrā,Stat. Achil. 1 104.— (poet.): artes magistrae,Ov. H. 15, 82: jussis parere magistris,Sil. 3, 387: clementia magistra,Claud. 22, 22.
Charlton T. Lewis, Charles Short, A Latin Dictionary