There is an article online by this title with great history and coinage. I do not know how to put a link up….Please help. Rich
Greek expertise needed: How does diadochi translate in Greek? succession, successors, or perhaps only used to mean these particular characters who fought over Alexander’s empire?
You looked up the wrong word. It's "διαδοχοι" (plural of "διαδοχος"-diadochos). The article got it wrong. The verb it derives from can mean "to receive in turn" and also "to relieve" in the sense of "taking over". In the modern language, "diadochos" can also mean the crown prince.
@Kavax "διαδοχη" is a FEMININE noun of the first declension that means the ACT of succeeding. "διαδοχος" is a masculine noun of the 2nd declension that means the successor.