slantendicular

slantendicular

or

slantindicular

adj
slanting (rather than perpendicular or horizontal)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Fritsch adopts what Andrew Lambirth calls a slantendicular approach, "looking sideways at the world, catching it at unexpected moments to reveal unusual truths.