puerilism

puerilism definition - medical

pu·er·il·ism (pyo͞oˈər-ə-lĭzˌəm, pyo͝orˈə-)

noun
Childish behavior in an adult, especially as a symptom of mental illness.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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