involution

2 ENTRIES FOUND:

in·vo·lu·tion

noun \ˌin-və-ˈlü-shən\

Definition of INVOLUTION

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
3
a :  an inward curvature or penetration
b :  the formation of a gastrula by ingrowth of cells formed at the dorsal lip
4
:  a shrinking or return to a former size
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 \-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

in·vo·lu·tion

noun \ˌin-və-ˈlü-shən\   (Medical Dictionary)

Medical Definition of INVOLUTION

1
a : an inward curvature or penetration b : the formation of a gastrula by ingrowth of cells formed at the dorsal lip
2
: a shrinking or return to a former size <involution of the uterus after pregnancy>
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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