The following terms define Building and Machine Parts
moldboard: flat or curved blade that pushes material aside as machine advances.
molding: wood strip with curved or decoratively cut surface.
mortise: notch or hole in wood that holds fitted tenon to form joint.
mullion: narrow bar that divides small windowpane glass or screen; vertical framing member that separates adjacent doors or windows.
muntin: wood member that separates glass panes in door or window.