Bible Dictionaries
Porphyrogenitism

Webster's Dictionary

(n.) The principle of succession in royal families, especially among the Eastern Roman emperors, by which a younger son, if born after the accession of his father to the throne, was preferred to an elder son who was not so born.

Bibliography Information
Webster, Noah. Entry for 'Porphyrogenitism'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/porphyrogenitism.html. 1828.