ma·ni·a·cal

[muh-nahy-uh-kuhl]
adjective
of or pertaining to mania or a maniac.

Origin:
1670–80; maniac + -al1

ma·ni·a·cal·ly, adverb
post·ma·ni·a·cal, adjective
pre·ma·ni·a·cal, adjective
sub·ma·ni·a·cal, adjective
sub·ma·ni·a·cal·ly, adverb
un·ma·ni·a·cal, adjective
un·ma·ni·a·cal·ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
maniacal or maniac (məˈnaɪəkəl, ˈmeɪnɪæk) [Click for IPA pronunciation guide]
 
adj
1.  affected with or characteristic of mania
2.  characteristic of or befitting a maniac: maniacal laughter
 
maniac or maniac
 
adj
 
ma'niacally or maniac
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Maniacal is always a great word to know.
So is quincunx. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Etymonline
Word Origin & History

maniacal
1670s, from maniac. Related: Maniacally.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

maniacal ma·ni·a·cal (mə-nī'ə-kəl) or ma·ni·ac (mā'nē-āk')
adj.
Suggestive of or afflicted with insanity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Single line, focused distribution with maniacal devotion to customer enthusiasm.
We think of science as rational but it isn't: it's obsessive, maniacal, driven to extremes of detail.
He approached the painstaking and exhausting work with almost maniacal dedication.
The evil face of that campaign was the dastardly, maniacal robot.
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