Webster’s Revised Unabridged Dictionary · 1913
Scaleboard
Scale′board′ (?; commonly ?), n. [3d scale + board.] 1. (Print.) A thin slip of wood used to justify a page. [Obs.] Crabb.
2. 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.