[UNDER-1 5 b.] (See quots.)
1754. [see STANDING vbl. sb. 6].
1846. A. Young, Naut. Dict., 33. The bevelling of a timber implies the angle contained between two of its adjacent sides: if an acute angle, it is termed an under bevelling (or bevel).
1875. Knight, Dict. Mech., 278/2. A standing beveling is made on the outside; an under beveling is one on an inner surface of a frame of timber.