The Arm, palm down (=Cubit) (hieroglyph), (''Arm, with Palm Down (hieroglyph)'') is
Gardiner's sign listed no. D42 in the series for ''parts of the human body''; a slightly different version with the upper arm ''slanted'', is not the cubit arm, no. D41,
D41. In the
Egyptian hieroglyphic language the "cubic arm" has the phonetic value of ''mḥ'', (meḥ)〔Budge, (1920), 1978. ''An Egyptian Hieroglyphic Dictionary,'' p. 316a.〕
The cubit is approximately 20 inches (from the elbow, to the tip of the fingers).