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involution

play
noun in·vo·lu·tion \ˌin-və-ˈlü-shən\

Definition of involution

  1. 1 a (1) :  the act or an instance of enfolding or entangling :  involvement (2) :  an involved grammatical construction usually characterized by the insertion of clauses between the subject and predicate b :  complexity, intricacy

  2. 2 :  exponentiation

  3. 3 a :  an inward curvature or penetration b :  the formation of a gastrula by ingrowth of cells formed at the dorsal lip

  4. 4 :  a shrinking or return to a former size

  5. 5 :  the regressive alterations of a body or its parts characteristic of the aging process <skeletal involution due to loss of estrogens at menopause>

in·vo·lu·tion·al play \-shnəl, -shə-nəl\ adjective


Examples of involution

  1. <the involution of the thriller's plot made it hard to follow>



Origin of involution

Latin involution-, involutio, from involvere


First Known Use: circa 1611


Medical Dictionary

involution

play
noun in·vo·lu·tion \ˌin-və-ˈlü-shən\

Medical Definition of involution

  1. 1a:  an inward curvature or penetrationb:  the formation of a gastrula by ingrowth of cells formed at the dorsal lip

  2. 2:  a shrinking or return to a former size <involution of the uterus after pregnancy>

  3. 3:  the regressive alterations of a body or its parts characteristic of the aging process; specifically :  decline marked by a decrease of bodily vigor and in women by menopause




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