i Register
In some senses, diametral is marked as obsolete. Watch for register when choosing this word.
diametral
adj 2noun 1
Definitions
adj
1
Of, relating to, or measured across a diameter.
2
Contrary; diametrically opposed.
noun
1
A diameter.
[…] The inceſſion or locall motion of animals is made vvith analogy unto this figure, by decuſſative diametrals, Quincunciall Lines and angles.
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