planal en · ADJ
Etymology
From plane + -al.
Meanings
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(not-comparable) Of or relating to a geometric plane.
“Silicon does work well, but it’s always been the limitation that you make silicon devices on hard, rigid, planal surfaces,” Dr. Whitesides said.
2009 April 30, Anne Eisenberg, “Solar Tech: Not Just on the Roof Anymore”, in New York Times: