The story
From porphyrogenite + -ism.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: 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 born prior to it. Full definition →
From porphyrogenite + -ism.
Etymology from Wiktionary, CC BY-SA 4.0.