acroamatic
adjective
ac·ro·a·mat·ic
¦a-krō-ə-¦ma-tik
variants or less commonly acroamatical
¦a-krō-ə-¦ma-tə-kəl
: told orally to chosen disciples only : esoteric
Word History
Etymology
Greek akroamatikos, from akroamat-, akroama + -ikos -ic
First Known Use
1635, in the meaning defined above