involution

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involution

 [in″vo-lu´shun]
1. a rolling or turning inward.
2. one of the movements involved in the gastrulation of many animals.
3. a retrograde change of the entire body or in a particular organ, as the retrograde changes in the female genital organs that result in normal size after delivery.
4. the progressive degeneration occurring naturally with advancing age, resulting in shriveling of organs or tissues. adj., adj involu´tional.
Involution of the uterus. Height of the uterine fundus decreases by approximately 1 cm/day. From McKinney et al., 2000.

in·vo·lu·tion

(in'vō-lū'shŭn),
1. Return of an enlarged organ to normal size.
2. Turning inward of the edges of a part.
3. In psychiatry, mental decline associated with advanced age.
Synonym(s): catagenesis
[L. in-volvo, pp. -volutus, to roll up]

involution

/in·vo·lu·tion/ (in″vo-loo´shun)
1. a rolling or turning inward.
2. a retrograde change of the body or of an organ, as the retrograde changes in size of the female genital organs after delivery.
3. the progressive degeneration occurring naturally with age, resulting in shriveling of organs or tissues.involu´tional

involution

(ĭn′və-lo͞o′shən)
n.
1.
a. The act of involving.
b. The state of being involved.
2. Intricacy; complexity.
3. Something, such as a long grammatical construction, that is intricate or complex.
4. Mathematics An operation, such as negation, which, when applied to itself, returns the original number.
5. Embryology The ingrowth and curling inward of a group of cells, as in the formation of a gastrula from a blastula.
6. Medicine
a. A decrease in size of an organ, as of the uterus following childbirth.
b. A progressive decline or degeneration of normal physiological functioning occurring as a result of the aging process.

in′vo·lu′tion·al adj.

involution

[in′vəlo̅o̅′shən]
Etymology: L, involvere, to wrap up
1 a normal process of turning or rolling inward characterized by a decrease in the size of an organ caused by a decrease in the size of its cells, such as postpartum involution of the uterus.
2 (in embryology) a developmental process in which a group of cells grows over the rim at the border of the organ or part and, rolling inward, rejoins the organ or part to form a tube, such as in the heart or bladder.

involution

Gynecology See Uterine involvement Medtalk A ↓in organ size or functional capacity, generally understood to be age-related.

in·vo·lu·tion

(in'vŏ-lū'shŭn)
1. Return of an enlarged organ to normal size.
2. Turning inward of the edges of a part.
3. psychiatry Mental decline associated with advanced age.
Synonym(s): catagenesis.
[L. in-volvo, pp. -volutus, to roll up]

involution

1. Decay, retrogression or shrinkage in size.
2. A return to a former state.
3. An infolding or INVAGINATION.

involution

(of plant organs) having rolled-up margins.

in·vo·lu·tion

(in'vŏ-lū'shŭn)
1. Return of an enlarged organ to normal size.
2. Turning inward of the edges of a part.
[L. in-volvo, pp. -volutus, to roll up]

involution

1. a rolling or turning inward.
2. one of the movements involved in the gastrulation of many animals.
3. a retrograde change of the entire body or in a particular organ, as the retrograde changes in the female genital organs that result in normal size after delivery.
4. the progressive degeneration occurring naturally with advancing age, resulting in shriveling of organs or tissues.

uterine involution
reduction in size of the uterus in the period immediately after parturition.
References in periodicals archive ?
The assumption that V is involutive implies that approximate first integrals always exist locally.
Let V be an involutive structure of hypersurface type on a compact manifold M.
A symmetric left adjoint in an involutive quantaloid Q is a left adjoint whose right adjoint is its involute: [f.
Instead, at least for involutive quantaloids, a Q-category A is symmetric when A(x, y) = A[(y, x).
2]) is not involutive and therefore, according to Theorem 5, system (44) is not static state feedback linearizable.
For k [greater than or equal to] 2, an involutive sequence of length k is either the sequence obtained from an involutive sequence of length k-1 by adding 0 at the end or the sequence obtained from an involutive sequence of length k-2 by adding an integer r at the end and inserting a 0 before the last r integers, including the newly added integer, for some 1 [less than or equal to] r [less than or equal to] k - 1.
k] of involutive sequences of length k satisfies the recurrence [v.
It is proved that each such representation induces an involutive mapping of an open dense subset of [R.
We can see that the operator (1) is transformed into the operator (6) via the involutive permutation p: ([a.
omega]] is involutive if and only if [omega] is: by analogy, also [bar.
Let F be an n-dimensional foliation on a Riemannian manifold ( N, g) of dimension m and denote by V the corresponding involutive distribution and by H its orthogonal distribution, which is not integrable in the general case.
The result proved above justifies the fact that the existence of the normal complemented metric framed structure implies the existence of the involutive distribution D [cross product] {[xi]} and consequently the existence of a foliation which we shall denote by [F.