Also known as: ld.
LD has various meanings in the Genealogy category. Discover the full forms, definitions, and usage contexts of LD in Genealogy.
The smooth, open area of a grooved surface, such as the bands of metal between the grooves in a piston which carry the piston rings. The metal separating a series of Grooves. For profile-sharpened milling cutters, the relieved portion immediately behind the cutting edge. On punches, the portion adjacent to the nose that is parallel to the axis and of maximum diameter.
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