The Collaborative International Dictionary
Scaleboard plane
Scaleboard \Scale"board`\ (?; commonly ?), n. [3d scale + board.]
(Print.) A thin slip of wood used to justify a page. [Obs.]
--Crabb.-
A thin veneer of leaf of wood used for covering the surface of articles of furniture, and the like.
Scaleboard plane, a plane for cutting from a board a wide shaving forming a scaleboard.
Wiktionary
scaleboard plane
n. A plane for cutting from a board a wide shaving forming a scaleboard.