involution
/ɪnvəˈluːʃən/noun
RareNot in standard dictionaries
1
Entanglement; a spiralling inwards; intricacy.
2
A complicated grammatical construction.
3
An endofunction whose square is equal to the identity function; a function equal to its inverse.
4
The shrinking of an organ (such as the uterus) to a former size.
5
The regressive changes in the body occurring with old age.
6
A power: the result of raising one number to the power of another.
7
A cessation of development or progress involving intense inner competition.
8
A state of increased competition for limited resources, requiring great effort to stay ahead.
9
The migration of a cell layer inward, sliding over an outer layer of cells. It occurs at gastrulation during embryogenesis.
#neologism#obsolete