From Wiktionary, the free dictionary
m ( “ in ” ) + ḏr ( “ limit, since, because ” ) .
( Late Egyptian ) makes a subjunctive-prospective sḏm.f construction serve as a dependent temporal clause as , when , at the time of, upon (some occurrence)after , since while
Alternative hieroglyphic writings of m-ḏr
( Late Egyptian ) because of See under the conjunction above.
Erman, Adolf , Grapow, Hermann (1931 ) Wörterbuch der ägyptischen Sprache [1] →ISBN pages 593.15–593.17 Junge, Friedrich (2005 ) Late Egyptian Grammar: An Introduction , second English edition, Oxford: Griffith Institute, pages 89, 108, 140, 143, 159, 224–228, 233 
