> as lemmas

1931 A. H. Jameson Contour Geom. i. 13 Draw a vertical section across the plane at right angles to the contours and draw circular arcs.., giving the rebated contours.

1994 J. Elkins Poetics of Perspective Envoi 275 Draw from D through D' and E through E' to find V, the ‘centre of perspective’ (in the terms employed in the history of perspective, a vertically rabatted center of projection).