The Collaborative International Dictionary of English v.0.48:
Ledgment \Ledg"ment\ (-ment), n. (Arch.) (a) A string-course or horizontal suit of moldings, such as the base moldings of a building. --Oxf. Gloss. (b) 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.] [1913 Webster]