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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

involution

Gynecology See Uterine involvement Medtalk A ↓in organ size or functional capacity, generally understood to be age-related.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

involution

1. Decay, retrogression or shrinkage in size.
2. A return to a former state.
3. An infolding or INVAGINATION.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

involution

(of plant organs) having rolled-up margins.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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]
Medical Dictionary for the Dental Professions © Farlex 2012