diametric

Adjective

• characterized by opposite extremes; completely opposed
  • in diametric contradiction to his claims
    
  • diametrical (or opposite) points of view
    
  • opposite meanings
    
  • extreme and indefensible polar positions
    

• related to or along a diameter
  • the diametral plane
    

Related words

• Synonyms: 
  diametrical , opposite , polar , diametral