What is "legement"

Ledgment \Ledg"ment\ (-ment), n. (Arch.)

1. A string-course or horizontal suit of moldings, such as the base moldings of a building.
   --Oxf. Gloss.

2. The development of the surface of a body on a plane, so that the dimensions of the different sides may be easily ascertained.
   --Gwilt. [Written also ledgement, legement, and ligement.]

n. (obsolete form of ledgment English)