Wikipedia
The ancient Egyptian Bone-with-meat hieroglyph is one of the Gardiner's sign list glyphs listed under Parts of Mammals. It is one of many – (52) in the category, as concepts were also presented by the body parts; for example hindquarters, and forequarters, represented things behind something, and alternatively, things at the forefront. The '' 'bone-with-meat' '' hieroglyph represented: ancestry, also inherit, (presumably bodies-souls, after death).
The Ancient Egyptian language usage of the hieroglyph means, ''isw, iw' '' (inherit, etc.); a determinative for the femur, (iw'); and swt, for the tibia.
The Old Kingdom usage on slab steles, from the middle of the 3rd millennium BC, shows the proto-type form of the hieroglyph as a 'cut of meat', much like the spare ribs or beef ribs of the present era. The slab stela shows the bone as a multiple of two curved bones, much like the spare rib.