#1
diametrical a. [
diametral, diametric] related to or along a diameter; "the diametral plane"
. wn #2
diametrical s. [
diametric, opposite, polar] 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"
. wn