skew arch definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an arch with jambs not at right angles with the face, as in a vault or tunnel which narrows or widens from its opening
skew arch definition by American Heritage Dictionary
An arch having sides not at right angles to the face of its abutments.