involutions >> ɪnvəˈl(j)uːʃ(ə)n
Definition: [noun] the shrinkage of an organ in old age or when inactive, e.g. of the uterus after childbirth.
Definition: [noun] a function, transformation, or operator that is equal to its inverse, i.e. which gives the identity when applied to itself.
Definition: [noun] the process of complicating something, or the state of being complicated.
Example: periods of artistic involution