diametral

adjective

di·​am·​e·​tral (ˈ)dī¦amə‧trəl 

1

: of or relating to a diameter : located at the diameter : constituting a diameter

the diametral plane

2

obsolete : diametric sense 2

Word History

Etymology

Middle French, from diametre + -al

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Rhymes for diametral

• petrel