acroamatic

adjective3

1. •
   Esoteric, abstruse; (in particular) taught orally to select students and not disseminated.
2. •
   Based on lectures or exposition by monologue.

   • Up to that time the “acroamatic” method had been used in which the catechist gave a lecture, and the children were only listeners (ἀκροᾶσθαι). — 1959
3. •
   (no longer used, rare) Of or pertaining to hearing.

   • Prate they not cataracts of insensible noise, / That with obstreperous cadence cracks the organs / Acroamatick, till the deaf auditor / Admires the words he heares not? — 1632