diametrical

[ dahy-uh-me-tri-kuh l or dahy-uh-me-trik ]

/ ˌdaɪ əˈmɛ trɪ kəl or ˌdaɪ əˈmɛ trɪk /

of, relating to, or along a diameter.

in direct opposition; being at opposite extremes; complete: diametrical opposites; a diametrical difference.

Origin of diametrical

1545–55; < Greek diametrik(ós) ( diámetr(os) diameter + -ikos -ic) + -al¹

di·a·met·ri·cal·ly, adverb un·di·a·met·ric, adjective un·di·a·met·ri·cal, adjective un·di·a·met·ri·cal·ly, adverb

Officials are bitterly divided over two diametrically opposed strategies.

Inspectors Uncover UK Schools Pushing Radical Islamic Agendas |Nico Hines |June 10, 2014 |DAILY BEAST
As new parents themselves, the Duke and Duchess of Cambridge have taken a diametrically opposite approach.

Will Prince George Be Photographed Down Under? |Tom Sykes |January 17, 2014 |DAILY BEAST
Unraveling the implications of these diametrically opposed responses to Blue is not an easy task.

Abdellatif Kechiche’s Palme d’Or Winner, ‘Blue Is the Warmest Color,’ Is Not Porn |Richard Porton |May 29, 2013 |DAILY BEAST
Bennett, who wants to annex 60 percent of the West Bank, is diametrically opposed to that goal.

Lapid Demands Civil Marriage In Israel |Sigal Samuel |March 6, 2013 |DAILY BEAST

But 19 and 12, though superficially similar in their youthfulness, are diametrically opposed regarding the elephant in the room.

Yair Lapid's Historic Opportunity |Bernard Avishai |January 24, 2013 |DAILY BEAST
In talents, temper, manners and opinions, the rivals were diametrically opposed to each other.

The History of England from the Accession of James II. |Thomas Babington Macaulay
These ideas, diametrically opposed to his own, made him smile.

Against The Grain |Joris-Karl Huysmans
But they do not agree together; some of them are diametrically opposed to others.

Loss and Gain |John Henry Newman
His own opinions were diametrically opposed to those which, on this occasion, he put forward in the most offensive manner.

The History of England from the Accession of James II. |Thomas Babington Macaulay
His remarks are diametrically opposite to the conjectures of Camden and Gale.

Notes and Queries, Vol. IV, Number 94, August 16, 1851 |Various

diametrically

/ (ˌdaɪəˈmɛtrɪkəlɪ) /

completely; utterly (esp in the phrase diametrically opposed)