κατήχ-ησις,εως,ἡ,
A. instruction by word of mouth: generally,instruction, Hp. Praec. 13 , Cic. Att. 15.12.2 , D.H. Dem. 50 , Din. 7 , Ath.Med. ap. Orib.
inc.
21.6 , S.E. M. 1.7 ;διὰ τὴν κ. τῶν συνόντωνbycommunicationwith companions, in bad sense, Chrysipp.Stoic. 3.54 , cf. 55 , Gal. 5.463 .
II. accompanimentof the monochord by louder instrumentswhich drownits tune, Ptol. Harm. 2.12 (pl.).