Meaning of adytum

ad•y•tum

Pronunciation: (ad'i-tum), [key]
— pl. -ta
  1. (in ancient worship) a sacred place that the public was forbidden to enter; an inner shrine.
  2. the most sacred or reserved part of any place of worship.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.