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Adytum
ADYTUM [isbe]
ADYTUM - ad'-i-tum (Latin from Greek aduton, adjective adutos, "not to be entered"): Applied to the innermost sanctuary or chambers in ancient temples, and to secret places which were open only to priests: hence, also to the Holy of Holies in the Jewish temple.See TEMPLE.
Also see definition of "Adytum" in Word Study