involutions

Noun

involution (countable and uncountable, plural involutions)

1. Entanglement; a spiralling inwards; intricacy.
   • […]usually his attention was diverted from her feet by her shrieks of laughter and the astounding involutions of her huge brown-yellow frame.1938, Xavier Herbert, chapter V, in Capricornia, page 74
2. A complicated grammatical construction.
   • Walter Pater’s essay on Style is honeycombed with involutions and preciosity.1917, James Huneker, Unicorns, New York: Scribner, Chapter 11 “Style and Rhythm in English Prose,” p. 129
3. An endofunction whose square is equal to the identity function; a function equal to its inverse.
   • Involutions have the property that they are their own inverses.1996, Alfred J. Menezesm, Paul C. van Oorschot, Scott A. Vanstone, Handbook of Applied Cryptography, CRC Press, page 10
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. (obsolete) A power: the result of raising one number to the power of another.

See all 9 meanings of involution