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involutional

[in-vuh-loo-shuh-nl] /ˌɪn vəˈlu ʃə nl/
adjective
1.
of, relating to, or characteristic of involutional melancholia:
involutional symptoms.
noun
2.
a person who suffers from involutional melancholia.
Origin of involutional
1905-1910
1905-10; involution + -al1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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