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noun, plural: involutions

(1) (biology) Reverting of the uterus and other genital organs to the pre-pregnant size and state following childbirth.

(2) (embryology) The inward movement of an expanding outer layer of cells, thereby forming a dorsal lip in animal gastrulation.

(3) (physiology) The progressive, retrograding or degenerating changes in a senescing (aging) body; catagenesis.

(4) (medicine) Shrinking of an organ.

(5) (general) Turning or rolling inward; enfolding.


Word origin: Latin involutio, from volvere (to roll).

Related form(s): involute

Related term(s):

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