from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Not conforming to type; unusual or irregular.

from The Century Dictionary.

  • Same as atypic.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Not conforming to the normal type.
  • adjective Unusual or irregular.
  • noun pharmacy An atypical antipsychotic.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective not representative of a group, class, or type
  • adjective deviating from normal expectations; somewhat odd, strange, or abnormal


from Wiktionary, Creative Commons Attribution/Share-Alike License

a- +‎ typical


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