di·a·met·ric \|dīə|me.trik, -rēk\adjective ordi·a·met·ri·cal\-rə̇kəl, -rēk-\ Etymology: Greek diametrikos, from diametros + -ikos -ic, -ical 1.: diametral 1 2.: completely opposed or opposite as if at the opposite end of a diameter < in diametric contradiction to his claims >