• (a.) Divided into lozenge-shaped compartments, as the field or a bearing, by lines drawn in the direction of the bend sinister.
(from the article `heraldry`) ...drawn from the top of the shield to the base. The lozenge is a parallelogram having equal sides and two acute and two obtuse angles, and a mascle ...
Loz'en·gy (-ĕn*jȳ) adjective [ French losangé . See Lozenge .] (Her.) Divided into lozenge-shaped compartments, as the field or a bearing, by lines drawn in the direction of the bend sinister. 
In heraldry, lozengy describes a field divided into lozenge-shaped compartments.