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Webster 1913 Edition

(-ment)

Noun.

(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

ledgment ‎(plural ledgments)

(architecture) A stringcourse or horizontal suit of mouldings, such as the base mouldings of a building.
The development of the surface of a body on a plane, so that the dimensions of the different sides may be easily ascertained.
(Can we find and add a quotation of Gwilt to this entry?)