chase mortise[′chās ‚mȯrd·əs]
A mortise with a sloping edge from bottom to surface so that a tenon can be inserted when the outside clearance is small.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
chase mortise, pulley mortise
A stub mortise which is larger than the tenon inserted into it; one side of the mortise is sloped, permitting the tenon to be inserted sideways; used where exterior clearance is limited.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.