in-volution

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noun

an act or instance of involving or entangling; involvement.

the state of being involved.

something complicated.

Botany, Zoology.

a rolling up or folding in upon itself.

a part so formed.

Biology. retrograde development; degeneration.

Physiology. the regressive changes in the body occurring with old age.

Grammar. a complex construction in which the subject is separated from its predicate by intervening clauses or phrases.

Mathematics. a function that is its own inverse.

Origin:
1605–15; < Medieval Latin involūtiōn- (stem of involūtiō). See involute, -ion

Related forms

su·per·in·vo·lu·tion, noun

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To in-volution

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In-volution is always a great word to know.

So is callithumpian. Does it mean:

a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.

an extraordinary or unusual thing, person, or event; an exceptional example or instance.

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Collins

World English Dictionary

involution (ˌɪnvəˈluːʃən)

—n
1.	the act of involving or complicating or the state of being involved or complicated
2.	something involved or complicated
3.	zoology degeneration or structural deformation
4.	biology an involute formation or structure
5.	physiol reduction in size of an organ or part, as of the uterus following childbirth or as a result of ageing
6.	Compare evolution an algebraic operation in which a number, variable, expression etc, is raised to a specified power
7.	grammar an involved construction, such as one in which the subject is separated from the predicate by an additional clause

invo'lutional

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage

Medical Dictionary

involution in·vo·lu·tion (ĭn'və-l&oomacr;'shən)
n.

A decrease in size of an organ, as of the uterus following childbirth.
The ingrowth and curling inward of a group of cells, as in the formation of a gastrula from a blastula.
A progressive decline or degeneration of normal physiological functioning occurring as a result of the aging process. Also called catagenesis.

in'vo·lu'tion·al adj.

American Heritage

Science Dictionary

involution

(ĭn'və-l

'shən) Pronunciation Key

A mathematical operation, such as negation, which, when applied to itself, returns the original number.
The ingrowth and curling inward of a group of cells, as in the formation of a gastrula from a blastula.
A decrease in size of an organ, as of the uterus following childbirth.

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