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cachinnation

/ (ˌkækɪˈneɪʃən) /
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noun

raucous laughter
psychiatry inappropriate laughter, sometimes found in schizophrenia

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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for cachinnation

cachinnation
[ kăk′ə-nāshən ]

n.

Loud, hard, or compulsive laughter without apparent cause.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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