What is "didascaly"

Didascaly, Greek Antiquity [modern ad. Greek διδασκαλία instruction, teaching; in plural as in quotation. So modern French didascalie.]

1. In The Catalogues of the ancient Greek Dramas, with their writers, dates, etc., such as were compiled by Aristotle and others.
2. The instruction of the chorus in ancient Greek theatre.
3. In ancient Greek theatre, the performance of a tetralogy.