First Known Use: 1611
Dictionary
adytum
noun ad·y·tum \ˈa-də-təm\
plural ad·y·ta \-tə\
Definition of ADYTUM
: the innermost sanctuary in an ancient temple open only to priests : sanctum
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Origin of ADYTUM
Latin, from Greek adyton, neuter of adytos not to be entered, from a- + dyein to enter
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