involutional

[in-vuh-loo-shuh-nl]

adjective

of, relating to, or characteristic of involutional melancholia: involutional symptoms.

noun

a person who suffers from involutional melancholia.

Origin of involutional

First recorded in 1905–10; involution + -al1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019