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involutional

 - 4 dictionary results

in⋅vo⋅lu⋅tion⋅al

  [in-vuh-loo-shuh-nl]
Use involutional in a Sentence
–adjective
1. of, pertaining to, or characteristic of involutional melancholia: involutional symptoms.
–noun
2. a person who suffers from involutional melancholia.
Origin:
1905–10; involution + -al 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To involutional
in·vo·lu·tion   (ĭn'və-lōō'shən)   
n.  

    1. The act of involving.

    2. The state of being involved.

    3. A decrease in size of an organ, as of the uterus following childbirth.

    4. A progressive decline or degeneration of normal physiological functioning occurring as a result of the aging process.

  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

    1. A decrease in size of an organ, as of the uterus following childbirth.

    2. A progressive decline or degeneration of normal physiological functioning occurring as a result of the aging process.


[Latin involūtiō, involūtiōn-, from involūtus, past participle of involvere, to enwrap; see involve.]
in'vo·lu'tion·al adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: 1in·vo·lu·tion·al
Pronunciation: "in-v&-'lüsh-n&l, -&n-&l
Function: adjective
1 : of or relating to involutional melancholia <involutional depression>
2 : of or relating to the climacterium and its associated bodily and psychicchanges involutional time of life>

Main Entry: 2involutional
Function: noun
: one who is affected with involutional melancholia
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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