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1. The innermost parts of a building, especially the sanctuary of a temple.
2. The most private or secret parts; recesses: the penetralia of the soul.
[Latin penetrālia, from neuter pl. of penetrālis, inner, from penetrāre, to penetrate; see penetrate.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. the innermost parts of a building
2. secret matters
[C17: from Latin, from penetrālis inner, from penetrāre to penetrate]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
pen•e•tra•li•a(ˌpɛn ɪˈtreɪ li ə)
1. the innermost parts or recesses.
2. the most private or secret things.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
the innermost parts or deepest recesses of a place, thing, etc.See also: Places
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.