D defs.my
Entry 1 sense Webster, 1913

Diametrically

· Di·am·e·tric·al·ly · IPA /ˌdaɪ.əˈmɛt.ɹɪk.li/
01 adv. In a diametrical manner; directly; as, diametrically opposite.
  1. 1.
    In a diametrical manner; directly; as, diametrically opposite.
    “Whose principles were diametrically opposed to his.” Macaulay.