What does acroamatic or acroamatical mean?
The definition of acroamatic and acroamatical
Ac`ro*a*mat”ic, Ac`ro*a*mat”ic*al, a.
Etym: [Gr.

Communicated orally; oral; — applied to the esoteric teachings of Aristotle, those intended for his genuine disciples, in distinction from his exoteric doctrines, which were adapted to outsiders or the public generally. Hence: Abstruse; profound.