mis·con·cep·tion

[mis-kuhn-sep-shuhn]
noun
an erroneous conception; mistaken notion.

Origin:
1655–65; mis-1 + conception

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
misconception (ˌmɪskənˈsɛpʃən) [Click for IPA pronunciation guide]
 
n
a false or mistaken view, opinion, or attitude

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Misconception is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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

misconception
1660s, from mis- (1) + conception. Related: Misconceptions.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The best way for someone to overcome a misconception is to have an experience
  that shows it is wrong.
Second, it is a common misconception that diesels are significantly more
  efficient.
It is a common misconception that size of the universe must be equal to the
  cosmological time multiplied by the speed of light.
For contrary to popular misconception, jazz is not an art form wildly
  improvised on the bandstand, at the whim of the moment.
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