"introversions" in the noun sense
1. invagination, introversion
the condition of being folded inward or sheathed
2. invagination, introversion, intussusception, infolding
the folding in of an outer layer so as to form a pocket in the surface
"the invagination of the blastula"
3. introversion
psychology) an introverted disposition concern with one's own thoughts and feelings
Source: WordNet® (An amazing lexical database of English)
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