Definition of "egromancy"

Then she stood up; and, pronouncing some word to me unintelligible, she said: — By virtue of my egromancy become thou half stone and half man; whereupon I became what thou seest, unable to rise or sit, and neither dead nor alive.

1885–1888, Richard F[rancis] Burton, transl. and editor, A Plain and Literal Translation of the Arabian Nights’ Entertainments, now Entituled The Book of the Thousand Nights and a Night […], Shammar edition, volume (please specify the volume), [London]: […] Burton Club […]

Whereby I know that this twelfth King of the house of Gorice in Carcë shall be a most crafty warlock […] who by the might of his egromancy and the sword of Witchland shall exceed all earthly powers that be.

1922, E.R. Eddison, The Worm Ouroboros