atypical

Adjective

• deviating from normal expectations; somewhat odd, strange, or abnormal
  • these days large families are atypical
    
  • atypical clinical findings
    
  • atypical pneumonia
    
  • highly irregular behavior
    

• not representative of a group, class, or type
  • a group that is atypical of the target audience
    
  • a class of atypical mosses
    
  • atypical behavior is not the accepted type of response that we expect from children
    

Related words

• Synonyms: 
  irregular , untypical