The innermost parts of a building, especially the sanctuary of a temple.
The most private or secret parts; recesses.
The penetralia of the soul.
The innermost parts, as of a temple.
Things kept private or secret.
Origin of penetralia
- Latin penetrālia from neuter pl. of penetrālis inner from penetrāre to penetrate penetrate
From American Heritage Dictionary of the English Language, 5th Edition