ACROAMATIC
Etymology
Adjective
acroamatic (comparative more acroamatic, superlative most acroamatic)
(rare) Of or related to esoteric knowledge transmitted orally, particularly (historical) applied to the teachings of Aristotle intended only for his disciples as opposed to the exoteric doctrines declaimed in public.
Of or related to lectures.
Source: Wiktionary
Ac`ro*a*mat"ic, Ac`ro*a*mat"ic*al, a. Etym: [Gr.
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition