PENETRALIA
PENETRALIUM
penetralium
(noun) the innermost parts
Source: WordNet® 3.1
Noun
penetralia pl (plural only)
The innermost, secret or hidden parts; mysteries.
The innermost parts of a building, such as a shrine, recess or a sanctuary within a temple.
Source: Wiktionary
Pen`e*tra"li*a, n. pl. Etym: [L., fr. penetralis penetrating,
internal. See Penetrate.]
1. The recesses, or innermost parts, of any thing or place,
especially of a temple or palace.
2. Hidden things or secrets; privacy; sanctuary; as, the sacred
penetralia of the home.
Source: Webster’s Unabridged Dictionary 1913 Edition