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maniacal

[muh-nahy-uh-kuh l]
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adjective
  1. of or relating to mania or a maniac.
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Origin of maniacal

First recorded in 1670–80; maniac + -al1
Related formsma·ni·a·cal·ly, adverbpost·ma·ni·a·cal, adjectivepre·ma·ni·a·cal, adjectivesub·ma·ni·a·cal, adjectivesub·ma·ni·a·cal·ly, adverbun·ma·ni·a·cal, adjectiveun·ma·ni·a·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for maniacally

maniacal

maniac (ˈmeɪnɪæk)

adjective
  1. affected with or characteristic of mania
  2. characteristic of or befitting a maniacmaniacal laughter
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Derived Formsmaniacally, adverb
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

Word Origin and History for maniacally

maniacal

adj.

1670s, from maniac (adj.) + -al (1). Related: Maniacally.

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Online Etymology Dictionary, © 2010 Douglas Harper

maniacally in Medicine

maniacal

(mə-nīə-kəl)
adj.
  1. Suggestive of or afflicted with insanity.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.